You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Elizabeth Wright, want to travel from DFW to PHL for my music concert. Can you please help me in this?

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

USER: My trip dates are from 04/03 to 04/05. Please check for only single connection.

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

USER: That's fine, thank you.

ASSISTANT: Most welcome.