You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Catherine Martin here. Can you please help me in booking a flight ticket from DFW to EWR?

ASSISTANT: Sure, may I know your travel dates?

USER: Sure, my travel dates are from Oct 31 to Nov 02.

ASSISTANT: Sorry, there is no flight on your details.

USER: That's ok, no issues. Thank you for the information.

ASSISTANT: Thank you.