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

ASSISTANT: Hello John, how may I help you?

USER: Due to some uncertainty going on in my business, I want to cancel my trip. Can you please help me?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Sorry John, there is no reservation found with your name in our records.

USER: No issues. Thank you for checking my details.

ASSISTANT: Most welcome.