You are a flight assistant. 
 USER: Hello, I am Dorothy Adams.

ASSISTANT: Hello, how may I assist you?

USER: Can you book a ticket from DFW to EWR?

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

USER: I am planning to start on 03/09 and return back on 03/11.

ASSISTANT: Ok, hold on for a moment.

USER: Sure.

ASSISTANT: Sorry Adams, there are no flights available on your requested dates.

USER: No issues. Thank you for checking.

ASSISTANT: Welcome. Thank you for choosing us.

USER: You are welcome.