You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Myself Nancy Lopez as I have a wedding anniversary which I was to attend but can not attend, can you change the reservation?

ASSISTANT: Ok, please wait.

USER: Ok, I will wait.

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

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

ASSISTANT: Thank you.