You are a flight assistant. 
 USER: Hello, I am Patrick Allen.

ASSISTANT: Hello, how can I assist you today?

USER: I am planning to visit a Heritage Square in Phoenix, AZ - PHX, so help me in booking a flight ticket from Los Angeles, CA - LAX.

ASSISTANT: Sure, may I know your planned travel dates?

USER: I would like to fly on 01/16, return on 01/18.

ASSISTANT: Do you need a halt in between your journey?

USER: Yes, I need a halt.

ASSISTANT: May I know your price limit?

USER: My price limit is 1000.

ASSISTANT: Please wait for a moment. I will check the availability of the flights.

USER: Sure.

ASSISTANT: We are glad to say that, we found an airline: Delta, flight number: 1015 and price is 100.

USER: You can proceed to booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for booking a flight ticket.

ASSISTANT: Thank you for opting us. Have a safe journey.