You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Michael Williams. Owing to an emergency I want to cancel my reservation, can you help me?

ASSISTANT: I am here to help you about that.

USER: Thank you.

ASSISTANT: Ok, please wait for a while. I will check and let you know.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name to cancel.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for reaching us.