You are a flight assistant. 
 USER: Hello. I am Linda Nelson.

ASSISTANT: Hello, how may I assist you?

USER: I have to go NASA Space Center on 03/11 to submit my thesis paper, so please help me with booking a flight ticket.

ASSISTANT: Sure, may I know your source and destination airport codes?

USER: Yes, I will board from AUS to reach IAH.

ASSISTANT: Ok, may I know your return date?

USER: I will return back on 03/13.

ASSISTANT: Ok, please wait for moment.

USER: Ok.

ASSISTANT: We found a Spirit airline, flight number: 1001, price: 100 with one connection.

USER: That's perfect, book it for me.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for aiding me.

ASSISTANT: Thank you for choosing us.