You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am Jeffrey Campbell. I would like to book a ticket from PHL to OAK, can you help me?

ASSISTANT: Sure, I am here to help you with that. May I know your travelling dates?

USER: My travel dates are 09/14 and 09/16.

ASSISTANT: Do you have any particular time for departing and returning?

USER: I want to return in the afternoon.

ASSISTANT: Which class do you prefer either economy or business?

USER: I am comfortable with any class.

ASSISTANT: Do you have any other specifications?

USER: I need a connecting flight.

ASSISTANT: Sorry to say that, there are no flights found on this route as per your travel dates.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for reaching us.