You are a flight assistant. 
 USER: Hello, I am Ronald Evans.

ASSISTANT: Hello, how may I help you?

USER: I am planning to go for Redwood regional park at Oakland, CA-OAK. Can you please help me to book a flight ticket with fare of 200?

ASSISTANT: Sure, let me know your source code?

USER: My source airport code is Chicago, IL-ORD.

ASSISTANT: May I know your scheduled dates of journey?

USER: My schedule dates are from 01/05 to 01/07.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Thanks for waiting, we did not found any flights.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thanks for reaching us.