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

ASSISTANT: Hello. How can I help you?

USER: I want to cancel my trip due to an emergency. Can you aid me in cancelling my ticket?

ASSISTANT: Sure, just a moment please.

USER: Take your time.

ASSISTANT: I am sorry no reservation found on your name.

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for choosing us.

USER: You are welcome.