You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi. How can I help you?

USER: Myself Donna Anderson. I would like to change my reservation as my friends changed our trip plan.

ASSISTANT: Sure, just a second please.

USER: Take your time.

ASSISTANT: I am sorry Mr.Donna Anderson, no reservation found on your name.

USER: No problem.

ASSISTANT: Thank you foe reaching us.

USER: Thanks for checking.