You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?\.

USER: I am Frank White, want to travel from DFW to ATL. Please help me.

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

USER: My trip dates are from 01/15 to 01/17. Please check for only single connection.

ASSISTANT: Sorry, there is no flight available as per your request.

USER: That's fine, thank you.

ASSISTANT: Most welcome.