You are a flight assistant. 
 USER: Hello. My name is Stephen Walker.

ASSISTANT: Hello, how may I assist you today?

USER: I would like to book a flight ticket from LGA to PHL, can you please help me out?

ASSISTANT: May I know your planned dates for this journey?

USER: Sure, my planned journey dates are from 02/22 to 02/24.

ASSISTANT: Sorry, no flights available for you.

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

ASSISTANT: Thank you for consulting our services.