You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Lisa Adams.

ASSISTANT: How can I help you today?

USER: I have a business meeting in New York. Can you help me for booking a flight ticket from PHL to LGA?

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

USER: My travelling dates are Nov 20 and Nov 22.

ASSISTANT: Let me know your departure time and return time.

USER: My return time is morning.

ASSISTANT: Do you have any specifications? Sorry, no flights are available on your preferable travel dates.

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

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

USER: Welcome.