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 can I aid you? 
 customer: I am Michael Harris. Can you help me to book a flight with 500 price limit? 
 agent: Sure, may I know your travelling dates? 
 customer: My travelling dates are 01/28 and 01/30. 
 agent: Can you share your airport codes? 
 customer: My airport codes are ORD and LAX. 
 agent: There is a connecting flight with fare 100, the number is 1024 in airline Delta. Can I book it? 
 customer: Yes, proceed with booking. 
 agent: Your ticket is booked. 
 customer: Thank you. 
 agent: Thank you for opting us.
A:
book