You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Jason Collins. I am planning to visit Angel Island at Oakland, could you please help me with booking a flight ticket from DEN to OAK?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: I would like to take off on 05/30 and return on 06/01.

ASSISTANT: Please allow me a moment.

USER: Sure, take your time.

ASSISTANT: Here is a direct flight with airfare is 200 in AA airlines, can I proceed with direct flight?

USER: But, I need a connecting flight.

ASSISTANT: Please wait, I will check with your requirement.

USER: Thank you.

ASSISTANT: Sorry Collins, there is no flight with 1 stop with your desired trip dates.

USER: That's ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for reaching us.