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, how may I help you? 
 customer: Myself Jason Johnson. I want to travel from DEN to OAK on 06/30 to 07/02. Can you help me? 
 agent: Sure,wait for a minute. 
 customer: Sure. 
 agent: Yes, I found a flight-1009 with Southwest airlines, Can I proceed? 
 customer: Price limit shall be 1000 and connection shall be only 1, can you check this? 
 agent: Yes, your ticket is booked. 
 customer: Ok, thanks. 
 agent: Thank you for contacting us.
Solution:
book