You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am planning to visit Denver, will you help me in booking the flight ticket from IAD to DEN?

ASSISTANT: Can I know your travel dates?

USER: My travelling dates are Nov 25 and Nov 27.

ASSISTANT: Is there any connection limit?

USER: I need a flight with single connection.

ASSISTANT: Do you have any preference?

USER: No, thank you for asking.

ASSISTANT: Let me know your name.

USER: Myself John Carter.

ASSISTANT: Found ticket with United airlines for price 100.

USER: Sure, you can proceed with the booking.

ASSISTANT: Your ticket is booked in an economy class having flight number 1015.

USER: Thank you for your help.

ASSISTANT: Thank you.