You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: Can you please book a flight ticket from AUS to IAH?

ASSISTANT: Sure, may I know your good name?

USER: Thank you. Myself Jack Lee.

ASSISTANT: Could I have your trip dates, please?

USER: Sure, I have planned my travel dates as June 09 and June 11.

ASSISTANT: Do you have any specifications?

USER: Yes, I would prefer business class to travel so please make sure that while checking for flight availability.

ASSISTANT: Sure, please let me know your connection limit?

USER: I am looking for single connecting flight.

ASSISTANT: Ok, please wait for a minute.

USER: Sure, take your time.

ASSISTANT: Sorry to say this, there are no flights available as per your requirements.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for choosing us.

USER: Most welcome.