You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Benjamin Baker. I want to book a ticket from OAK to SFO, can you please book a ticket?

ASSISTANT: Sure, may I know your dates of travel?

USER: My travelling dates are on Jan 02 and Jan 04.

ASSISTANT: Do you have any connection limit?

USER: No, I need a direct flight.

ASSISTANT: Is there any preference in class?

USER: No.

ASSISTANT: Ok, please wait a minute.

USER: Sure, and I need to depart at morning.

ASSISTANT: Sorry, there were no flights found on your route.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for availing us.