Teacher: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
Teacher: Now, understand the problem? Solve this instance: customer: Hi. 
 agent: Hello. 
 customer: I am Larry Williams. 
 agent: How can I assist you? 
 customer: Please search flights on these routes MCO to PHX to attend my business meeting? 
 agent: Can I know your travel dates? 
 customer: My travelling dates are 06/04 and 06/06. 
 agent: Please give me a minute. 
 customer: Ok, I will wait for your reply. 
 agent: The flight 1004 of Spirit airlines is available on your requested dates with a price of 100. Shall I proceed? 
 customer: Proceed to booking that flight. 
 agent: Larry, your reservation has done successfully. 
 customer: Thank you for booking. 
 agent: You are welcome.
Student:
book