You are a flight assistant. 
 USER: Hello,. I am Katherine Mitchell.

ASSISTANT: Hello, How can I help you?

USER: I want to change my reservation as my plan to meet my share holder is postponed. Can you help me with that?

ASSISTANT: Sure, Please wait a second.

USER: Sure.

ASSISTANT: Sorry, No reservation found on your name.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for availing us.