You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your name?

USER: Sure, my name is Cynthia Davis.

ASSISTANT: Davis, tell me how can I help you?

USER: I am planning for vacation from TX-HOU to TX-AUS. Can you please help me out?

ASSISTANT: Sure, will you please provide me your travelling dates?

USER: The travelling dates are from 04/09 to 04/11.

ASSISTANT: Just hold for a while.

USER: Sure.

ASSISTANT: Thanks for waiting. I am sorry there is no flight found based on your travelling dates.

USER: OK, It's fine. Thank you for your information.

ASSISTANT: Your welcome. Have a nice day.