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 can I assist you? 
 customer: My holiday trip has been cancelled, could you please help me with cancelling my recent reservation? 
 agent: Sure, can I know your name please? 
 customer: My reservation was done under the name Mary Mitchell. 
 agent: Please wait a moment. 
 customer: Sure, take your time. 
 agent: I found your reservation. 
 customer: Please cancel it. 
 agent: I have cancelled your reservation. 
 customer: Thank you for your help. 
 agent: Thank you for approaching us.
cancel