You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you today?

USER: I am Jeffrey Thompson. I would like to attend Environmental Science Conferences in Lawrence Hall of Science at Oakland, OAK. Can you help me in booking with a connecting flight?

ASSISTANT: May I know your planned travel dates?

USER: My planned dates of travelling are 12/16 and 12/18.

ASSISTANT: Please share me your source point.

USER: Source is from Atlanta, ATL.

ASSISTANT: Sorry to say that, no connecting flights were found with your given details.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.