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

ASSISTANT: Hello, how may I assist you?

USER: I want to participate in the multi-car 50 mile canyon road test drive, which is going to be held at Dallas, TX-DFW. So can you please help me in booking a flight ticket from Seattle, SEA?

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are from 07/02 to 07/04.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your route.

USER: That's not a problem.

ASSISTANT: Thank you for reaching us.

USER: Thanks for your information.