You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I would like to travel from MSP to DCA. Can you please help me?

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

USER: My trip dates are from 01/08 to 01/10.

ASSISTANT: Do you have any other requirements?

USER: I want a single connection.

ASSISTANT: Ok, can I know your name please?

USER: Myself Michael Green.

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

USER: That's fine, thank you.

ASSISTANT: My pleasure.