You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I want to book a ticket from SFO to OAK, can you help me?

ASSISTANT: Sure, We are here to help you. Can I know your travelling dates?

USER: My trip dates are 11/30 and 12/02.

ASSISTANT: Do you need any break?

USER: I prefer a connecting flight.

ASSISTANT: May I know your name?

USER: I am Katherine Clark.

ASSISTANT: Is there any other specifications?

USER: I want to depart and return in the afternoon.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Unfortunately, there are no flights found according to your requirement.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for reaching us.