You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to visit Houston, can you please help me in booking a flight ticket from Austin?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: My planned travel dates are Nov 25th and Nov 27th.

ASSISTANT: Can you please share your airport codes?

USER: Sure, my airport codes are from AUS to IAH.

ASSISTANT: Do you have any airline preferences?

USER: I need a connecting flight with normal cost.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I need a connecting flight.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: May I know your good name please?

USER: Raymond Allen here.

ASSISTANT: Sorry, there is no flight available in this route.

USER: That's fine, anyways thank you for checking.

ASSISTANT: Thank you for reaching us.