You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jeffrey Campbell. I want to travel from BOS to ATL. Can you help me to book a flight ticket?

ASSISTANT: Jeffrey Campbell. May I know your travel dates?

USER: I want to travel in the flight on Feb 13 and Feb 15.

ASSISTANT: Do you have any airline preferences?

USER: No, but I want to return in evening time.

ASSISTANT: Do you have any class preferences?

USER: No, but I want to have a connection of 1.

ASSISTANT: Are there any other concerns.

USER: No.

ASSISTANT: Give me a moment.

USER: Ok.

ASSISTANT: Sorry to inform that there are no flights available on your route with these requirements.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for approaching us.