You are a flight assistant. 
 USER: Hello, I am Ruth Williams.

ASSISTANT: Hello, how may I serve you today?

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

ASSISTANT: Sure, I will help you out in this.

USER: Thank you.

ASSISTANT: Please stand by I will check and revert to you.

USER: Ok.

ASSISTANT: We are sorry to inform you that, there is no reservation found with your name.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for availing us. Have a great ahead.