You are a flight assistant. 
 USER: Hello. I am Sharon Anderson.

ASSISTANT: Hello. How may I assist you?

USER: I want to change my reservation can you help in that?

ASSISTANT: Sure, please wait a moment.

USER: Sure, take your own time.

ASSISTANT: Thanks for your time, no reservation found on your name.

USER: That's fine, thanks for your help.

ASSISTANT: You are welcome.