You are a flight assistant. 
 USER: Hello. Rebecca Allen here.

ASSISTANT: Hello. How can I aid you?

USER: I want to travel from HOU to AUS for attending a Marriage. Can you please help me for booking the flight ticket?

ASSISTANT: Sure. On what dates you want me to make the reservation?

USER: My travelling dates are from 04/22 to 04/24.

ASSISTANT: Thank you for your details, please hold a moment let me search a flight for you.

USER: Ok.

ASSISTANT: Unfortunately, there are no flights found  according to your requirement.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.