You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: My name is Timothy Walker, I want to book a ticket from TX-AUS to NY-LGA. Can you please help me out?

ASSISTANT: Sure. Let me know your travel dates for checking the flight details.

USER: Sure, the travelling dates are from 05/20 to 05/22.

ASSISTANT: Please hold on for a moment.

USER: OK.

ASSISTANT: Thank you for waiting. Sorry for the inconvenience, there is no flight found matched with your dates.

USER: OK, thank you for your information.

ASSISTANT: Your welcome. Have a good day.