You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: I want to book a ticket from PHL to SFO. Could you book a ticket?

ASSISTANT: Sure, do you need halt in between your journey?

USER: Yes, I need a halt.

ASSISTANT: Can you please share your depart and return dates?

USER: Trip dates are Jan, 7 to Jan, 9.

ASSISTANT: Do you have any other requirements?

USER: I need a single connection flight.

ASSISTANT: Ok, may I know your name please?

USER: My name is William Collins.

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

USER: Thank you.

ASSISTANT: Thank you for opting us.