To the Globe (TTG): Towards Language-Driven Guaranteed Travel Planning

Da JU; Song Jiang; Andrew Cohen; Aaron Foss; Sasha Mitts; Arman Zharmagambetov; Brandon Amos; Xian Li; Justine T Kao; Maryam Fazel-Zarandi; Yuandong Tian

arXiv · 2410.16456

To the Globe (TTG): Towards Language-Driven Guaranteed Travel Planning

Da JU·Song Jiang·Andrew Cohen·Aaron Foss·Sasha Mitts·Arman Zharmagambetov·Brandon Amos·Xian Li·Justine T Kao·Maryam Fazel-Zarandi·Yuandong Tian

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Abstract

Travel planning is a challenging and time-consuming task that aims to find an itinerary which satisfies multiple, interdependent constraints regarding flights, accommodations, attractions, and other travel arrangements. In this paper, we propose To the Globe (TTG), a real-time demo system that takes natural language requests from users, translates it to symbolic form via a fine-tuned Large Language Model, and produces optimal travel itineraries with Mixed Integer Linear Programming solvers. The overall system takes ~5 seconds to reply to the user request with guaranteed itineraries. To train TTG, we develop a synthetic data pipeline that generates user requests, flight and hotel information in symbolic form without human annotations, based on the statistics of real-world datasets, and fine-tune an LLM to translate NL user requests to their symbolic form, which is sent to the symbolic solver to compute optimal itineraries. Our NL-symbolic translation achieves ~91% exact match in a backtranslation metric (i.e., whether the estimated symbolic form of generated natural language matches the groundtruth), and its returned itineraries have a ratio of 0.979 compared to the optimal cost of the ground truth user request. When evaluated by users, TTG achieves consistently high Net Promoter Scores (NPS) of 35-40% on generated itinerary.

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Da JU, Song Jiang, Andrew Cohen, Aaron Foss, Sasha Mitts, Arman Zharmagambetov, Brandon Amos, Xian Li, Justine T Kao, Maryam Fazel-Zarandi, Yuandong Tian. 2024-10-21. To the Globe (TTG): Towards Language-Driven Guaranteed Travel Planning. https://arxiv.org/abs/2410.16456

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