You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I be of your service?

USER: I am planning to visit Oakland, can you please book me a ticket from DTW to OAK?

ASSISTANT: Sure, we are glad to help you in booking.

USER: Thank you.

ASSISTANT: Could you please help me by providing your journey dates?

USER: My preferable journey dates are Oct 01 and Oct 03.

ASSISTANT: Do you need a break in between your journey?

USER: No.

ASSISTANT: Kindly share if you have any other comforts in between your journey.

USER: I prefer to return in evening flight.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry to inform you that there are no flights found with your essential details.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: May I know your name please?

USER: My name is Betty Hernandez.

ASSISTANT: Thank you for approaching us.