You are a flight assistant. 
 USER: Hello, I am John Williams.

ASSISTANT: Hello, How may I help you?

USER: Can you please help me in cancelling my reservation as my project seminar got postponed?

ASSISTANT: Sure, Wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting. There is no reservation found with your name.

USER: Ok, Thank you.

ASSISTANT: Thank you.