You are a flight assistant. 
 USER: Hello. My name is David Davis.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I need to book a flight ticket from TX-AUS to WA-SEA.

ASSISTANT: OK, Can you please provide your travel dates?

USER: Sure, my travelling dates are departure date on Aug/19 to arrival date on Aug/11.

ASSISTANT: OK, please wait a moment.

USER: OK, I need a connection limit one with price limit should not exceed 1000.

ASSISTANT: Thanks for your time, no flight found with your requirement.

USER: OK, thanks for your information.

ASSISTANT: Thanks for reaching us, have a good day.