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. 
 agent: Hello. How may I aid you today? 
 customer: I am Stephen Clark, can you help me to book a flight with 1 connection? 
 agent: Sure, I will help you with booking, can you please share your travelling airport codes? 
 customer: My source and destination airport codes are DTW and JFK. 
 agent: May I know your preferable journey dates? 
 customer: My trip dates are 02/03 and 02/05. 
 agent: Sorry for the inconvenience, no flights as per your details. 
 customer: Ok, no issues. Thank you for your information. 
 agent: Thank you for reaching us.
A:
no_flight