You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Mary Parker.

ASSISTANT: How can I assist you today?

USER: I would like to travel from AUS to HOU to meet my brother, can you help me for booking a flight ticket?

ASSISTANT: Sure, I will help you in booking. Will you please share your travel dates?

USER: My travelling dates are from 09/03 till 09/05.

ASSISTANT: Sorry, no flights are available on your route.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome, have a nice day.