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: Hello. 
 agent: Hello, how can I help you today? 
 customer: I want to attend a Seminar in Atlanta. Can you please help me for booking the flight ticket? 
 agent: Sure, kindly share your travel dates. 
 customer: My travelling dates are Apr 29 and May 01. 
 agent: May I know your airport codes? 
 customer: My airport codes are SFO and ATL. 
 agent: Please share your name. 
 customer: My name is Karen Garcia. 
 agent: Do you have any connection limit? 
 customer: I prefer single connection. 
 agent: Ok, please wait a moment. 
 customer: Ok, I will wait. 
 agent: Sorry to inform, no flights found with your requirement. 
 customer: Anyway, thanks for the information. 
 agent: Thanks for reaching us.
A:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
no_flight