You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Larry Carter.

ASSISTANT: How may I help you today?

USER: Can you please help me in booking a flight ticket from PHX to SFO?

ASSISTANT: Sure, may I know your travelling dates please?

USER: My preferable dates of journey are 25th of June to 27th of June.

ASSISTANT: Do you have any price limit for the ticket?

USER: Yes, I can afford up to 500.

ASSISTANT: May I know about your class preference?

USER: I am comfortable with any class.

ASSISTANT: Please wait for a while,I will check with it.

USER: Sure.

ASSISTANT: There is a direct flight with economy class, shall I proceed?

USER: No, do not proceed. I need a connecting flight.

ASSISTANT: Sorry, there is no connecting flight as per your requirements.

USER: It's ok, thank you for your information.

ASSISTANT: Thanks for your patience.