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
Q: customer: Hi. 
 agent: Hello, how can I assist you? 
 customer: Rebecca Gonzalez here. Please help me out in booking the ticket from OAK to BOS. 
 agent: Sure, can you please provide your travel dates? 
 customer: My trip dates will be 07/28 to 07/30. 
 agent: Do you have any preferences? 
 customer: My depart time must be in the morning. 
 agent: Is there any class preference? 
 customer: No. 
 agent: Ok, please wait a minute. 
 customer: Ok. 
 agent: We found an American airline with flight 1019 having a fare 100 with stopover. Shall I proceed with booking? 
 customer: Please proceed. 
 agent: Your booking has been done. 
 customer: Thank you. 
 agent: Thank you.
A:
book