You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: Can you aid me in booking a flight ticket from PHX to LGA?

ASSISTANT: Sure, I am here to help you. Can you please provide your journey dates?

USER: Sure, I would like to go on July 22nd and return back on July 24th.

ASSISTANT: Do you have any connection limit preference?

USER: Ensure it is a single connecting flight.

ASSISTANT: May I know your class preference?

USER: Ensure it is in the economy class.

ASSISTANT: Do you have any other specifications?

USER: No, I don't have any other specifications.

ASSISTANT: Can you please provide your name ?

USER: Myself Christine Davis.

ASSISTANT: Christine Davis, there are no flight services are available on this route with your preferences.

USER: That's ok, thank you for checking the availability.

ASSISTANT: Thank you for contacting us.