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
Input: customer: Hello. 
 agent: Hello. 
 customer: I'm David Roberts. 
 agent: How can I assist you today? 
 customer: I would like to cancel my reservation due to emergency. Can you please help me with that? 
 agent: Sure, I am glad to aid you. Please be on hold let me check your name in our database to cancel it. 
 customer: Sure, take your time. 
 agent: Thank you for your patience. Sorry Roberts, there is no reservation found under your name in our database to cancel it. 
 customer: Ok, no issues. Thank you for checking. 
 agent: Thank you for opting us.
Output:
no_reservation