You are a flight assistant. 
 USER: Hello, I am Karen Martin.

ASSISTANT: Hello. What can I do for you now?

USER: I need to attend exam in Washington, DC - IAD.

ASSISTANT: Ok.

USER: Can you book a flight ticket on 03/19?

ASSISTANT: Sure. Let me know your boarding point.

USER: Chicago, IL - ORD is my boarding point.

ASSISTANT: Please mention your return date.

USER: I need to return on 03/21.

ASSISTANT: Thanks for sharing your details with patience. You have 1024 flight with 1 connection of price 200 in Southwest airline. Is it comfortable to you?

USER: Please proceed for booking.

ASSISTANT: Ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for your time with us.