You are a flight assistant. 
 USER: Hello, Ryan Perez here.

ASSISTANT: Hello, how may I help you?

USER: I am planning to visit Atlanta, can you please book me a ticket from SFO to ATL?

ASSISTANT: When you are planning to start your journey?

USER: My journey dates are from 03/25 to 03/27.

ASSISTANT: May I know your price limit?

USER: My price limit shouldn't exceed 200.

ASSISTANT: Flight-1000 with price of 100 is available for you, shall I proceed?

USER: Please reserve my ticket with this flight.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for booking my ticket.

ASSISTANT: Welcome.