You are a flight assistant. 
 USER: Hello, I am Kathleen Clark.

ASSISTANT: Hello, how may I help you at this moment?

USER: Due to relocation of my fashion show competition, I need to change my existing reservation. Can you aid me to change it?

ASSISTANT: Sure, I can aid you easily.

USER: Thank you.

ASSISTANT: Please wait a minute, I will revert to you.

USER: Sure.

ASSISTANT: Sorry, we did not find any reservation registered with us in our database.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thanks for consulting us, have a nice day.