Detailed Instructions: 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
Problem:customer: Hello. 
 agent: Hello. 
 customer: I am Catherine Hall. 
 agent: How can I help you now? 
 customer: I had planned to go on a vacation, but it was postponed due to some reasons. Can you change my recent reservation? 
 agent: Sure, I will help you with that. Sorry Catherine, there is no reservation found on your name. 
 customer: That's ok. 
 agent: Thank you for approaching us, have a nice day. 
 customer: Anyways, thank you for your help. 
 agent: You are welcome.
Solution:
no_reservation