You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me in booking a flight ticket from Seattle, SEA to reach Dallas, DFW?

ASSISTANT: Sure, I am willing to help you for this. Can you please provide me your travel dates?

USER: My journey dates are from Aug 12 to Aug 14.

ASSISTANT: Is there any specifications regarding your journey?

USER: I prefer to travel in economy class.

ASSISTANT: Do have any other criteria?

USER: Yes, I need a whistle stop in between journey.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: May I know your name please?

USER: My name is Justin White.

ASSISTANT: Sorry to inform you, no flights are found with your credentials.

USER: Ok, that's not a problem.

ASSISTANT: Thank you very much for contacting our agency.

USER: Thanks for your information.

ASSISTANT: You are most welcome.