You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Mark Mitchell.

ASSISTANT: Yes, Mark Mitchell.

USER: Can you help me to book a flight from JFK to IAD?

ASSISTANT: Sure, I can help you with that. Can you please share your planned departure and return travel dates?

USER: I am planning to move on 26 December and return on 28 December.

ASSISTANT: Ok, do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Fine, JetBlue airlines is providing a flight on that route with ticket fare of 200. Shall I proceed for booking?

USER: That's perfect, proceed to booking.

ASSISTANT: I have successfully booked your ticket in economy class and the flight number is 1001, have a safe journey.

USER: Thanks for helping me.

ASSISTANT: Thank you for reaching us.