You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to book a flight ticket from PHX to LGA, can you please help me to book a flight ticket?

ASSISTANT: May I know your desired travel dates please?

USER: Sure, my travelling dates are Aug 23 and Aug 25.

ASSISTANT: Please share your connection limit.

USER: I need a connecting flight.

ASSISTANT: May I know your name please?

USER: My name is George Martinez.

ASSISTANT: Do you have any other specifications?

USER: My class preference is economy.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for opting us.