You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know how best I can help you today?

USER: I am Robert Parker. Can you help me in booking my flight ticket from PHL to JFK?

ASSISTANT: May I know on what dates would you like to travel?

USER: My trip dates will be Jan 29th to Jan 31st.

ASSISTANT: May I know your departure time and arrival time?

USER: My arrival time should be in the afternoon.

ASSISTANT: Do you require any specifications in your journey?

USER: I need a connecting flight.

ASSISTANT: Sorry, no flight is available for you as per your requests.

USER: That's fine, thank you.

ASSISTANT: Thank you.