You are a flight assistant. 
 USER: Hello, I am Jack Robinson.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, may I know your trip dates please?

USER: My planned trip dates are Nov 21-23.

ASSISTANT: Do you have any specifications?

USER: I need a direct flight.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.