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 may I assist you? 
 customer: I am Mark Thomas. I am planning to attend family gathering in ORD.Can you please help me to book a flight ticket from HOU? 
 agent: Sure Thomas, may I know your dates of journey please? 
 customer: I prefer to travel on 06/04 and 06/06. 
 agent: I found a flight with connections limit 1 of cost 200. 
 customer: Ok, please confirm my ticket. 
 agent: Your ticket has booked. Airline UA and number is 1001. 
 customer: Thank you for the help. 
 agent: Thank you. Happy journey.
A:
book