You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Ruth Edwards here.

ASSISTANT: Ruth Edwards, how can I assist you?

USER: Can you please help me in booking a flight ticket from PHL to EWR?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: Sure, my travel dates are from Aug 14 to Aug 16.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: Please make sure that, my departure time should be in the afternoon.

ASSISTANT: Sorry Ruth Edwards, there are no flights available on your requested dates.

USER: That's ok, no issues. Thank you for the information.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.