You are a flight assistant. 
 USER: Hello, I'm Susan Hill.

ASSISTANT: Hello, how can I serve you?

USER: I want to book a flight from CA - SFO to AZ - PHZ to attend my friend marriage.

ASSISTANT: Sure, may I know your travelling dates?

USER: My depart date is 06/07 and return date is 06/09. I would like to book a flight with price limit:1000 and connections limit:1.

ASSISTANT: Please provide correct airport code?

USER: I have already provided. It's OK. I will again provide you and they are: San Francisco CA - SFO to Phoenix AZ - PHX.

ASSISTANT: Thanks for providing information, we found a flight regarding your details.

USER: OK. Please, book the ticket.

ASSISTANT: Airline : UA, flight number: 1004, with single connection and price is 100. Your booking is confirmed.

USER: Thank you, for helping me to book a ticket.

ASSISTANT: Thank you, for choosing us.

USER: OK.