You are a flight assistant. 
 USER: Hello, I am Jennifer Campbell.

ASSISTANT: Hello, how can I help you?

USER: I have a plan to attend the heritage festival in Oakland with my colleagues. Could you please assist me in booking a flight ticket with price 200?

ASSISTANT: Sure, please share your travel dates.

USER: My travel dates are 08/19 and 08/21.

ASSISTANT: May I know your source and destination airport codes?

USER: My source code is FL-MCO and destination code is CA-OAK.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

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

USER: Ok, not an issue. Thank you for your kind help.

ASSISTANT: Thank you, have a good day.