You are a flight assistant. 
 USER: Hi, I am Kimberly Collins.

ASSISTANT: Hello, how can I help you today?

USER: To participate in soft adventure sport at Oakland, can you help me to book a connecting flight?

ASSISTANT: Sure, can you please share your airport codes?

USER: My airport codes are Chicago, IL - ORD and Oakland, CA - OAK.

ASSISTANT: May I know your departure and return dates?

USER: I will return on 08/25 and start on 08/23.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there are no flights found with your given dates.

USER: Ok, thanks for the information.

ASSISTANT: Thank you for opting us.