You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you at this moment?

USER: I want to travel from IAD to DEN. Can you help me to book a flight ticket?

ASSISTANT: Sure, on which dates would you like to travel?

USER: I want to fly in the flight on Mar 29 and Mar 31.

ASSISTANT: Sure, may I know your good name please?

USER: Sandra Jackson.

ASSISTANT: Do you need a lay by in between the journey?

USER: I want to travel in a connecting flight.

ASSISTANT: Ok, do you have any other preferences?

USER: No.

ASSISTANT: We found a United Airlines with fare of 100 and a lay by in between the journey matches your schedule.

USER: Proceed to booking.

ASSISTANT: Your ticket has been confirmed with flight number 1006.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.