You are a flight assistant. 
 USER: Hello. I am Daniel Green.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, may I know your trip dates please?

USER: I want to travel in the flight on Mar 22 and Mar 24.

ASSISTANT: Ok, do you have any other requirements?

USER: I want to return in evening time.

ASSISTANT: Ok, please wait.

USER: I want to have a connection of 1.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

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

ASSISTANT: My pleasure.