You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Dorothy Collins.

ASSISTANT: How I can aid you today?

USER: I would like to visit Denver to meet my friend, please help me in booking a ticket from PHX to DEN.

ASSISTANT: Sure, I am very glad to help you.

USER: Thank you.

ASSISTANT: May I know your journey dates for booking a flight ticket?

USER: My journey dates are 09/21 and 09/23.

ASSISTANT: Please wait for a moment.

USER: Sure, take your time.

ASSISTANT: The flight is available with Hawaiian airline having one connection limit and airfare is 800. Shall I proceed with booking?

USER: Please check the price below 500.

ASSISTANT: According to our records, the flight is exceed with price limit 500 above.

USER: Ok, please do not book my ticket.

ASSISTANT: That's ok, thank you for reaching us.

USER: Thank you.