You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Matthew Carter, want to travel from IAH to ATL. Can you please help me?

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

USER: My travelling dates are from 06/04 to 06/06. Please check for only direct flight.

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

USER: That's fine, thank you.

ASSISTANT: Most welcome.