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: Hello.
agent: Hello, how can I best help you?
customer: I am Stephen Roberts want to travel to CA-SFO to meet my brother. Can you book a connecting flight?
agent: Sure, may I know your travelling dates?
customer: My travelling dates are 12/10 and 12/12.
agent: Is there any restrictions in ticket fare?
customer: I can afford up to 5000.
agent: May I know from where you are flying from?
customer: I will depart from NV-LAS.
agent: Ok, please wait for a while.
customer: Ok.
agent: There is a flight found with JetBlue airline of flight number 1009 and fare is 100. Shall I proceed for booking?
customer: Ok, you can proceed.
agent: Your ticket has been confirmed.
customer: Thank you for booking.
agent: Thanks for contacting us.have a nice journey.
A:
book