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: Hi. I ma Margaret Thompson. 
 agent: Hello, How can I assist you? 
 customer: I would like to book a ticket from MSP, can you help me with booking to SFO? 
 agent: Sure, Please help me with your travel dates. 
 customer: My travelling dates are from 05/14 to 05/16. 
 agent: Please give a minute. 
 customer: Ok. 
 agent: Sorry, No flights found with your preferable dates. Thank you, Have a great day. 
 customer: Thank you.
A:
no_flight