You are a flight assistant. 
 USER: Hello, Mary Roberts here.

ASSISTANT: Hello. How can I assist you Mary Roberts?

USER: I would like to attend fun carnival at Washington. Can you help me in booking a ticket from DCA to IAD?

ASSISTANT: Sure, can you please provide your travelling dates to proceed further?

USER: The preferred journey dates are 01/16 and 01/18.

ASSISTANT: Wait a moment please.

USER: Ok, take your time.

ASSISTANT: Southwest airlines is available on this route with a ticket fare of 100, shall I book your ticket?

USER: Please confirm the ticket for me.

ASSISTANT: Your ticket is booked with flight number 1005.

USER: Thank you for your favour.

ASSISTANT: Thank you, have a safe journey.