You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I have made an earlier reservation to attend for a meeting, due to some issues my meeting has been postponed. Can you please aid me to change my reservation on the name of Joseph Wright?

ASSISTANT: Yes, I can do that for you.

USER: Thank you.

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

USER: Ok, no worries. Thanks for your help.

ASSISTANT: Thank you for reaching us.