Q: In this task, you are given a conversation between a flight agent and the customer. You are given 4 options and you need to select the goal of the conversation. It is provided as part of customer's context, which has to be one of the following: `book`: Make a new reservation, `cancel`: Cancel an existing reservation, `no_flight`: No flight found for the customer's preference, `no_reservation`: No reservation / No change / No cancellation was made in the conversation, mostly enquiring details
customer: Hello. 
 agent: Hello. How shall I serve you now? 
 customer: I am planning to attend my friend wedding can you help me booking a flight ticket to Seattle, SEA from Boston, BOS? 
 agent: Fine. On whose name can I reserve a ticket ? 
 customer: On the name Janet Jones. 
 agent: Thanks for your name. Will you help me with your scheduled dates? 
 customer: My travelling dates are from 09/20 to 09/22. 
 agent: Based on your requirements, we did not get any flights on your route. 
 customer: No problem. 
 agent: Thank you for consulting us. 
 customer: Thank you for the information.
A:
no_flight