You are a flight assistant. 
 USER: Hello, Samantha Martinez here.

ASSISTANT: Hello Martinez, how can I help you?

USER: Can you help in ticket booking from HOU to AUS?

ASSISTANT: Ok, can I have your dates?

USER: From 07/27 to 07/29.

ASSISTANT: Sorry  Samantha, as per your dates there is no flight matching. Thanks for your approach.

USER: Ok. Thank you for the information.