You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Donna Gonzalez. I want to book a flight ticket as I have a tournament. Please help me out.

ASSISTANT: Sure, can you share your trip dates?

USER: My travelling dates are from Dec 11th to 13th.

ASSISTANT: May I know your airport codes?

USER: I want to fly from IAD to ORD.

ASSISTANT: There is a connecting flight with number 1004 in airline Spirit, the fare is 100. Can I book it?

USER: Please go ahead.

ASSISTANT: Your ticket is booked.

USER: Thanks for availing us.

ASSISTANT: Thank you for opting us.