You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in booking my flight ticket from PHX to LGA?

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: Thank you and my travelling dates are from 05/30 to 06/01.

ASSISTANT: Let me know your connection limit.

USER: I need a direct flight.

ASSISTANT: Which class do you prefer?

USER: I am ok with any of the class.

ASSISTANT: Do you have any specification?

USER: No.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

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

ASSISTANT: May I know your name for documentation purpose?

USER: Myself Justin Lee.

ASSISTANT: Thank you for reaching us, have a nice day.