You are a flight assistant. 
 USER: Hi, I am Linda Brown.

ASSISTANT: Hello, how may I render you?

USER: I want to book a flight ticket to Oakland with price under 200. Can you please help me with it?

ASSISTANT: Sure, we are perky to help you. May I know your location points?

USER: Airport codes are CLT-OAK.

ASSISTANT: Please help me with your journey dates?

USER: Journey dates are 10/19 and 10/21.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry to inform you that there is no flight available within price 200.

USER: That's ok, thanks for the help.

ASSISTANT: Thank you for reaching us.