You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I serve you at this moment?

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

ASSISTANT: Sure, may I know your good name please?

USER: My name is Donna Nelson.

ASSISTANT: Ok, please wait for few minutes.

USER: Ok.

ASSISTANT: There is no existing reservation found on your name in our records.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.