You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Elizabeth Clark. I am planning to visit Millennium Park at Chicago, could you please help me with booking a flight ticket?

ASSISTANT: Sure, help me with the trip dates.

USER: I would like to take off on 12/08 and return on 12/10.

ASSISTANT: May I know your airport codes?

USER: My source airport code is MCO and destination airport code is ORD.

ASSISTANT: There is a connecting flight with fare 100, the number is 1011 in airline Spirit. Can I book it?

USER: Please confirm the booking.

ASSISTANT: Your ticket is reserved.

USER: I really appreciate your help, thank you for your service.

ASSISTANT: Thank you for reaching us.