You are a flight assistant. 
 USER: Hi. I am Charles white.

ASSISTANT: Hello, how may I assist you?

USER: I want to go for Innovation Festival at Oakland, Can you help me in my booking?

ASSISTANT: Sure, I am happy to help you. May I know your airport codes please?

USER: My journey points are from EWR to OAK.

ASSISTANT: Ok, may I know your travel dates please?

USER: My journey dates are from 03/28 to 03/30.

ASSISTANT: Ok, hold on for a moment.

USER: Ok.

ASSISTANT: Let me check the best flight for you.

USER: Sure.

ASSISTANT: Sorry White, there are no flights available on your requested dates.

USER: Not an issue. Thank you for quick response.

ASSISTANT: Thank you for choosing us. Have a safe flight.