You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Ashley Lopez, want to travel from MCO to DFW. Please help me in booking my ticket.

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

USER: Sure, my trip dates are from 08/27 to 08/29.

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

USER: It's ok, thank you.

ASSISTANT: My pleasure.