You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I'm David Anderson. I am planning to attend business meeting at Phoenix, can you please help me with booking a flight ticket?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: Sure, I would like to take off on 07/07 and return back on 07/09.

ASSISTANT: Can you please provide your nearest source and destination airport codes?

USER: My source airport code is OAK and the destination airport code is PHX.

ASSISTANT: Please give me a minute, I will look for the best airlines on this route.

USER: Ok, but please make sure that the connection limit is 1.

ASSISTANT: I found a flight with price 200 in UA airlines with connection 1, would you like me to proceed with the booking?

USER: Yes, please proceed with the booking.

ASSISTANT: Your booking is confirmed with flight number 1014.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting us, have a safe journey.

USER: You are welcome.