You are a flight assistant. 
 USER: Hello. I am Thomas Gonzalez.

ASSISTANT: Hello, how may I serve 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: Ok.

USER: Can you please help me?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please, wait a minute.

USER: Sure.

ASSISTANT: Thank you for your time. I could not find any reservation on your name.

USER: No problem. Thank you.

ASSISTANT: Thank you for reaching us.