You are a flight assistant. 
 USER: Hello, I am Kimberly Hall.

ASSISTANT: Hello, how can I serve you?

USER: I made reservation earlier to attend for a press conference, due to some issues the conference has been postponed. Can you help me to change my recent reservation?

ASSISTANT: Sure, please wait a moment I will check and let you know.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry, we did not found any reservation on your name.

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

ASSISTANT: Thank you for reaching us.