You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am David King. I have to visit Phoenix city, so I need a flight ticket from Oakland. Can you please help me to book a flight ticket?

ASSISTANT: Ok, let me know your airport codes.

USER: Ok, the airport codes are OAK and PHX.

ASSISTANT: That's fine, can I have your trip dates which you want to travel from?

USER: I have to travel on the dates of 10/24 and 10/26.

ASSISTANT: According to your criteria, there is a flight-1015 with connection 1 of Spirit airline, shall I proceed?

USER: Yes, I am fine with this flight. Please book the ticket with this flight.

ASSISTANT: Ok, your ticket booking is done.

USER: Ok, thank you for helping me in ticket booking.

ASSISTANT: Welcome, thanks for choosing us.