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

ASSISTANT: Hello. How can I aid 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.

ASSISTANT: Sure, I can help you. Please wait a while.

USER: Ok.

ASSISTANT: Thanks for being waiting. We didnt found any reservation by this name.

USER: Ok, not an issue. Thanks for your information.

ASSISTANT: Thank you for choosing us.