You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to travel from DCA to MSP, can you help me out?

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

USER: My travel dates are from 06/25 till 06/27.

ASSISTANT: Ok, hold on for a moment.

USER: Myself Lisa Carter.

ASSISTANT: Sorry Lisa, there are no flights available on that particular route.

USER: That's ok, no problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your help.