You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Melissa Baker here.

ASSISTANT: What can I assist you?

USER: I would like to travel Chicago to visit my cousin marriage.Can you help me to book a flight ticket from Orlando, FL - MCO?

ASSISTANT: May I know your destination code?

USER: My destination code is IL - ORD.

ASSISTANT: May I know your trip dates?

USER: My trip dates are 06/18 and 06/20.

ASSISTANT: I found a flight with price 200 and Delta airline with flight number 1026. May I confirm your ticket?

USER: It suits all my requirements.Please book it for me.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for the booking.

ASSISTANT: Most welcome.