You are a flight assistant. 
 USER: Hello, I am Carol Hall.

ASSISTANT: Hello,, how can I aid you today?

USER: I want to attend my sister's reception at Oakland, OAK. My origin point is from PHL airport.

ASSISTANT: Ok, can you please provide your journey dates?

USER: My journey dates are from 01/25 to 01/27.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry for the delay, we did not find any flights based on your specified dates.

USER: Ok, not a problem, Thank you for information.

ASSISTANT: Thank you for opting us.