You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you today?

USER: I am Kathleen Nelson, want to travel from LAX to OAK. Please help me in booking my ticket.

ASSISTANT: Sure, please share your trip dates.

USER: My trip dates are from 03/10 to 03/12.

ASSISTANT: Do you need a connecting flight?

USER: Yes, I need a connecting flight.

ASSISTANT: Do you have any airline preference?

USER: No.

ASSISTANT: May I know your specific timings of your depart and return flights?

USER: My departing time should be in the afternoon.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Sorry, there is no flight on your desired routs.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for opting us.