You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Alexander Hill.

ASSISTANT: How may I help you today?

USER: I am planning to visit space center at Houston, Can you please help me out to book a ticket for me?

ASSISTANT: Sure, I am here to help you. Could you send me your travelling dates?

USER: I would like to travel on 12/21 and return back on 12/23.

ASSISTANT: Please wait for a while. May I know your exact airport codes?

USER: My nearest source code is AUS and destination airport code is IAH.

ASSISTANT: Ok, wait for a second.

USER: Sure, I will wait for your reply.

ASSISTANT: The AA airlines are providing a flight having a connection limit 1 with the ticket fare is 100. Can I proceed with the booking?

USER: That's great, please proceed the booking.

ASSISTANT: Your ticket is reserved with the flight number 1005.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us. Have a safe journey.