You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: This is Benjamin Wright. Can you please help me in booking a flight ticket from PHL to SFO?

ASSISTANT: Sure, I will help you. Can you please share your planned journey dates?

USER: My travel dates are 05/17 and 05/19.

ASSISTANT: Let me know your connection limit.

USER: I prefer a single connecting flight.

ASSISTANT: Which class would you prefer for your journey?

USER: I prefer an economy class.

ASSISTANT: Do you have any other requirements?

USER: I want to return in afternoon.

ASSISTANT: Please, wait for a while.

USER: Ok.

ASSISTANT: Thank you for waiting, there is a flight available with price 300 and single connection in Delta airline which will depart at 21:00 PM and return at 17:00 PM. Shall I confirm it?

USER: Yes, please proceed.

ASSISTANT: Your ticket has been confirmed in economy class with flight number 1006.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.