You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

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

ASSISTANT: Yes, I can help you. Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for reaching us.