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
Input: customer: Hi. 
 agent: Hello. How can I aid you today? 
 customer: I am Sharon Lopez, can you help me to search a flight from HOU? 
 agent: Sure, I will help you with that, can you please share your travelling dates? 
 customer: I would like to travel on 04/15 and 04/17. 
 agent: May I know your destination airport code? 
 customer: I am planning to visit Orlando to meet my friends,  airport code is MCO. 
 agent: Ok, please hold on for a moment to check availability of flights. 
 customer: Sure. 
 agent: There is a flight in Spirit airline with connection 1 as per your details, can I proceed to booking? 
 customer: Yes, proceed. 
 agent: Your ticket is confirmed by flight number 1007. 
 customer: Thank you. 
 agent: You are welcome.
Output:
book