You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Mark Baker.

ASSISTANT: Thank you for providing your name.

USER: I am looking for a direct flight, could you please help me with booking a flight ticket?

ASSISTANT: Sure, we are here to help you. May I know your journey dates?

USER: I would like to take off on 02/27 and return on 02/29.

ASSISTANT: Kindly, mention your price limit.

USER: Make sure that the price limit should not exceed 200.

ASSISTANT: Can you share your airport codes?

USER: My nearest source airport code is OAK and destination airport code is CLT.

ASSISTANT: Thank you for providing information, please hold on.

USER: Sure.

ASSISTANT: Thank you for your patience. We did not find any direct flight to CLT.

USER: That's ok, I will find an another alternate way to complete my trip.

ASSISTANT: Thank you for choosing us, have a mirthful day.

USER: Thank you for your service.