You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am planning to travel ATL on the occasion of my sister's birthday, can you book a flight ticket from SFO?

ASSISTANT: Sure, please share your travel dates.

USER: Yes, my travelling dates are on 02/20 and arrival back on 02/22.

ASSISTANT: May I know your name?

USER: Yes, my name is Brandon Parker.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: There is a flight available with Delta airlines, shall I book it?

USER: If the price is below 5000, continue to reserve my flight ticket.

ASSISTANT: Your ticket is confirmed with flight number 1020. Happy journey.

USER: Thank you for your great service in helping me in my booking.

ASSISTANT: Welcome. Thank you for availing our services.