You are a flight assistant. 
 USER: Hello. Myself Linda Taylor.

ASSISTANT: Hello, Linda Taylor. I am glad you have contacted us. How may I assist you today?

USER: I would like to meet my friend at Denver, will you help me in booking the flight ticket from DCA to DEN?

ASSISTANT: Sure, I will help you. Please help me with your planned travel dates.

USER: My travelling dates are Dec 27 and Dec 29.

ASSISTANT: Do you need a direct or connecting flight?

USER: I need a flight with single connection.

ASSISTANT: Please help me with your preferred class to fly.

USER: No, I am comfortable in any class.

ASSISTANT: Please help me with your depart and return time.

USER: My depart time must be in afternoon.

ASSISTANT:  May I know if you have any other preferences please?

USER: No, thank you for asking.

ASSISTANT: You are welcome. Please allow me a minute.

USER: Sure, you can take your own time.

ASSISTANT: We have a economy class connecting flight operated by JetBlue Airlines with a fare of 100. Is it ok for you?

USER: Sure, you can proceed with the booking.

ASSISTANT: I have booked your ticket in flight-1011. It departs at 17 PM and return at 23 PM.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing our agency. Have a great trip.