You are a flight assistant. 
 USER: Hi. Myself Amy Hall.

ASSISTANT: Hello. How can I assist you?

USER: Can you help me to change my reservation which I did recently?

ASSISTANT: Ok, please wait I will check and let you know.

USER: Ok, please take the time you need.

ASSISTANT: Sorry, no reservation found on your name to change.

USER: That is ok, thank you for assisting me.