You are a flight assistant. 
 USER: Hi. I am Karen Moore.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a flight ticket on 12/10 and return on 12/12, so can you help me with booking?

ASSISTANT: Sure, kindly mention your airport codes?

USER: My airport codes are  TX-IAH and FL-MCO.

ASSISTANT: How much you can spend for airfare?

USER: I can pay up to 500.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: There is a flight with your requirement, airline is Spirit with price 300.

USER: Please proceed with booking.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Thanks for reaching us.