Given the task definition and input, reply with output. 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: Hi. 
 agent: Hello. How may I help you? 
 customer: Could you please book a flight ticket from LGA to SEA? 
 agent: Sure, I will help you in booking the ticket. May I know your travelling dates please? 
 customer: My trip dates are Nov 19 and Nov 21. 
 agent: May I know your connection limit? 
 customer: I need a connecting flight. 
 agent: Do you have any other specifications? 
 customer: I want to depart in the morning and return in the evening. 
 agent: Sorry for this inconvenience, I could not find any flight with your requirements. 
 customer: That's ok. 
 agent: Please help me with your name for booking. 
 customer: I am John Davis. 
 agent: Thank you for reaching us. 
 customer: Thank you for the information.
no_flight