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, I am Samuel Hall from Las Vegas.
agent: Hello, how may I help you at this moment?
customer: I need to attend an conference meeting at Philadelphia, PA-PHL. So can you please help me in booking a ticket within fare of 200?
agent: Sure, I will aid you. Please send your travelling dates.
customer: My travelling dates are from 06/24 to 06/26.
agent: Noted. Can I have your source airport code?
customer: My boarding airport code is NV-LAS.
agent: There is a connecting flight available with Spirit airline, shall I book it?
customer: I don't want Spirit airline, can you please check for any another airline for me?
agent: Yes, Hawaiian airline is also providing service on your route. Shall I proceed?
customer: That's perfect airline for me, please proceed for booking.
agent: Your booking is done with flight number 1007. Happy journey.
customer: Thanks for your extendable customer support in booking.
agent: You are welcome. Thank you for reaching us, have a nice day.
A:
book