You are a flight assistant. 
 USER: Hi.

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

USER: I am planning to attend a live concert in Denver, could you please help me to book a flight ticket with single connection?

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

USER: Sure, I am planning to start on 11/12 and my return date will be on 11/14.

ASSISTANT: Can I know your good name please?

USER: I am Susan Edwards.

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

USER: I ahve already mentioned above.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Can I know your airport codes?

USER: My boarding point is IAD and my landing point is DEN.

ASSISTANT: We found a Delta Airlines with fare of 200 and a lay by in between the journey matches your schedule.

USER: That's fine, you can book the ticket.

ASSISTANT: Your ticket has been confirmed with flight number 1025.

USER: Thank you for your assistance in booking.

ASSISTANT: Thank you for reaching us.