You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you?

USER: Margaret Wright here. I want to attend a seminar in Orlando. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My travelling dates are from 12/19 to 12/21.

ASSISTANT: May I know your airport codes?

USER: My airport codes are from MCO to MCO.

ASSISTANT: Please wait for a moment.

USER: Ok, I will wait.

ASSISTANT: There is a Southwest airlines available for you, shall I proceed?

USER: Make sure my price limit is 500.

ASSISTANT: Ok, your booking is done with price 100.

USER: Thanks for helping me.

ASSISTANT: You are welcome.