You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I need to travel Houston, can you please reserve flight ticket from AUS and HOU?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: My travelling dates are June,30 and July,02.

ASSISTANT: Do you have any preferences?

USER: I prefer for connecting flight.

ASSISTANT: May I know your name please?

USER: Myself Andrew Campbell.

ASSISTANT: Sorry, there is no flight available with your requirements.

USER: That's ok, I will chose any other alternate source to reach my destination.

ASSISTANT: You are welcome, have a nice day.

USER: Thank you.