You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I am planning to travel from DFW to IAD. Can you please help me to book a ticket?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: I want to start on Dec 27 and return on Dec 29.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: May I know your name please?.

USER: Steven Martinez here.

ASSISTANT: There is a direct flight available with Delta airline, shall I proceed?

USER: You can proceed to booking.

ASSISTANT: Your booking is done with flight number 1003. Happy journey.

USER: Thank you.

ASSISTANT: You are welcome, have a nice day.