You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Edward Martin here, I need your help in booking the ticket.

ASSISTANT: Sure.

USER: I am planning to visit for a party from ORD to DFW.

ASSISTANT: Please provide your travel dates, you are wishing to travel.

USER: My travelling dates are from 03/15 to 03/17.

ASSISTANT: Sorry to say Martin, there is no flight available on your dates.

USER: Ok, no issues. Thanks for providing information.

ASSISTANT: Thanks for reaching us, Martin. Have a great day.