You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

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

ASSISTANT: When you are willing to travel?

USER: Departure is by July, 10 and return date is July, 12.

ASSISTANT: Do you have any connection limit?

USER: I would prefer connecting flight.

ASSISTANT: Do you have any other requirement?

USER: I would like to depart in the afternoon.

ASSISTANT: May, I know your good name?

USER: My name is Robert Edwards.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: Thank you.

ASSISTANT: Thank you for reaching us.