You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I  help you today?

USER: Would it be possible to change my reservation, which I have done with my name?

ASSISTANT:  Sure, I am here to help you with that. May I know your name please?

USER: Thank you, my name is Katherine Mitchell.

ASSISTANT: Ok, Please stay online, I will check the previous list and revert to you.

USER: Ok.

ASSISTANT: We are sorry to say that, there is no active reservation found on your name.

USER: That's ok, thank you for the response.

ASSISTANT: Thanks for reaching us.