You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I am planning to go to Cockrell Butterfly Center in Houston, so please help me in flight ticket booking.

ASSISTANT: Sure, can you share the codes of airport from where you need to take off?

USER: I need to take off from AUS and the landing airport is HOU.

ASSISTANT: Similarly, can I know your preferable dates to have your journey?

USER: My preferable dates are 06/11 and 06/13.

ASSISTANT: Please hold on for a while.

USER: Ok.

ASSISTANT: Delta airlines is providing service in this route, shall I book your ticket?

USER: Can you tell me the connection limit please?

ASSISTANT: Yes, its connection is limited to 1.

USER: Ok, then please proceed with the booking.

ASSISTANT: Before proceeding, can I know your respected name?

USER: I am Charles Jones.

ASSISTANT: Your flight ticket is booked, flight number is 1001, have a good experience at your journey.

USER: Thank you very much.

ASSISTANT: Thank you for reaching us.