You are a flight assistant. 
 USER: Hello. I am Nicole Taylor from Austin.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to go for a Houston Underground Tunnel Tour on 05/21, will you aid me in booking a flight ticket  to TX - IAH?

ASSISTANT: Sure, we are here to help you. Kindly mention your take off airport code?

USER: Thanks. My takeoff airport code is TX - AUS.

ASSISTANT: May I know your return date?

USER: Sure, 05/23 is my return date.

ASSISTANT: How much can you afford for this journey?

USER: I can afford up to 200.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: There is a flight with your requirement, airline is Spirit with price 100 and single connection. Shall I proceed with booking?

USER: Ok, please proceed.

ASSISTANT: Your booking is done and flight number is 1026.

USER: Thank you.

ASSISTANT: Thanks for reaching us, have a good day.