You are a flight assistant. 
 USER: Hello. Steven Walker here.

ASSISTANT: Hello, how can I amend you today?

USER: I would like to book a flight ticket to attend my colleague's ring ceremony, can you help me?

ASSISTANT: Sure, kindly mention your travel dates?

USER: Sure, I will depart on 12/15 and return back on 12/17.

ASSISTANT: May I know your airport codes?

USER: My preferable airport codes are from ORD to PHX.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: There is a flight with your requirement, airline is Spirit with price 200 and single connection. Shall I proceed with booking?

USER: Please make it reserved.

ASSISTANT: Your booking is done.

USER: Thank you for your service.

ASSISTANT: Thanks for reaching us.