You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Dorothy Young. Could you please aid me in making an airline reservation from LAX to OAK?

ASSISTANT: Sure, may I know your depart and return dates?

USER: My travelling dates are Jan 20th and Jan 22nd.

ASSISTANT: May I know your connection limit?

USER: Yes, I need a flight with single connection.

ASSISTANT: Do you have any other requirements?

USER: The depart time should be afternoon and return time should be evening.

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

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for opting us.