You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I want to book a connecting flight from OAK to LAX. Can you please help me with the booking?

ASSISTANT: Sure, do you have any limits on number of connections?

USER: Yes, I am looking for a flight with single connection.

ASSISTANT: Please share your travelling dates.

USER: Sure, I want to start my journey on Oct 19 and need to end it on Oct 21.

ASSISTANT: Do you have class preference?

USER: I need a business class flight.

ASSISTANT: Is there any other requirements?

USER: My return time must be in the morning.

ASSISTANT: May I know your name?

USER: Yes, I am Dorothy  Edwards.

ASSISTANT: Sorry, there are no flights found based on your details.

USER: Ok, no problem. Thank you for checking.

ASSISTANT: Thank you for choosing us.