You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your name?

USER: I am Ronald Martin.

ASSISTANT: Martin, how can I abet you?

USER: I am planning to travel from PHL to LGA, can you help me out?

ASSISTANT: Surely I will help you, please provide me your preferred dates of journey.

USER: My preferable dates are 12/06 to 12/08.

ASSISTANT: On those dates, no airline is providing service in that route.

USER: book the ticket for me.

ASSISTANT: No flights are available on those dates, Martin.

USER: That's fine. Thank you.

ASSISTANT: Thank you for choosing us.