You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Christine Martin.

ASSISTANT: How can I assist you at this moment?

USER: I am planning to attend music concert at San Francisco, can you please help me with booking a flight ticket?

ASSISTANT: Sure, I will help you with that. Can I have your travel dates please?

USER: Sure, I would like to take off on 05/13 and return back on 05/15.

ASSISTANT: Ok, please let me know airport codes too.

USER: My source airport code is ORD and the destination airport code is SFO.

ASSISTANT: Please be hold on for a moment.

USER: Ok, but please make sure that the connection is 1.

ASSISTANT: I have found a flight in Spirit airlines with connection 1 and price 100, is it ok for you?

USER: Yes, please proceed with the booking.

ASSISTANT: Ok Martin, I have confirmed a ticket with flight number 1000.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us, have a great journey.