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: Hello. 
 agent: Hello, how can I assist you? 
 customer: I am Angela Garcia. Could you help me to make a reservation from Houston, IAH to New York, LGA? 
 agent: Sure, please share your travelling dates. 
 customer: My travel dates are on 02/06 and 02/08. 
 agent: Let me know your specifications. 
 customer: I need a halt in between journey. 
 agent: Unfortunately, there are no flights available based on your details. 
 customer: Ok, not a problem. Thank you. 
 agent: Thank you for choosing us.
A:
no_flight