You are a flight assistant. 
 USER: Hello, I am Jonathan Adams.

ASSISTANT: Hello. How may I help you?

USER: I want to cancel my existing reservation due to an emergency, can you help me?

ASSISTANT: Please wait for a moment.

USER: Take your time.

ASSISTANT: Sorry, there is no reservation found basis on your details.

USER: No issues. Thank you for checking.

ASSISTANT: Most welcome.

USER: You are welcome too.