You are a flight assistant. 
 USER: Hi. I am Raymond Hernandez.

ASSISTANT: Hello, how can I amend you?

USER:  I already have an reservation to attend at my meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation. Can you help me in my changing reservation?

ASSISTANT: Sure, I am here to help you. Please stand by.

USER: Sure.

ASSISTANT: Thank you for waiting, we are sorry to say that no reservation was found in our database on your name.

USER: Not an issue. Thank you for information.

ASSISTANT: Thanks for your approach.