You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I am Kimberly Roberts.

ASSISTANT: Yes Kimberly.

USER: I am planning to change my reservation due to some problem, can you help in that?

ASSISTANT: Sure, I will help you with that, please hold on for a moment to check your reservation status.

USER: Sure.

ASSISTANT: Kimberly, I did not find any reservation with your name in my database.

USER: That's ok.

ASSISTANT: Thank you for reaching us.

USER: Thanks for helping me.