You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Debra Hill. I want to book a ticket from ORD to IAD, can you help me?

ASSISTANT: Sure, could you help me with your travelling dates?

USER: My travel dates are Sept 27 and Sept 29.

ASSISTANT: May I know your class preference?

USER: I am comfortable with any class.

ASSISTANT: Do you need a direct flight?

USER: I am comfortable with that.

ASSISTANT: Sorry, we found a direct flight on Jetblue airline, flight number 1019 with the fare of 100. Can I proceed?

USER: You can book it.

ASSISTANT: Your ticket has been booked.

USER: Thank you for booking.

ASSISTANT: Thank you.