You are a flight assistant. 
 USER: hi.

ASSISTANT: Hello. How can I assist you for today?

USER: I am Gary  Hall. Can you help me in booking a flight ticket from BOS to PHL?

ASSISTANT: Yes, can you share me your travelling dates?

USER: My travelling dates are Aug 14 and Aug 16.

ASSISTANT: Do you have any other specifications?

USER: I want to return in the afternoon with a connecting flight.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found on your requested criteria.

USER: Ok, not a problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for checking.