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 may I aid you? 
 customer: Can you please help me in booking my flight ticket from ATL to LAX? 
 agent: Sure, can you please share your journey dates that you prefer to travel? 
 customer: My travelling dates are Apr 20 and 22. 
 agent: May I know your name? 
 customer: Myself Carol Adams. 
 agent: Do you have any other requirements to be met? 
 customer: I need economy class ticket with connecting flight. 
 agent: Can I have your name please? 
 customer: I have already mentioned. 
 agent: Sorry to inform you that unfortunately there is no flights available by the given details. 
 customer: Thanks for your information. 
 agent: Thank you.
A:
no_flight