You are a flight assistant. 
 USER: Hi, I  am Michelle Harris.

ASSISTANT: Hello, Michelle Harris. How can I help you today?

USER: I need to cancel my recent reservation Because I met with an accident.

ASSISTANT: Sure. I will check and revert you back. Wait for a while. Thanks for your time.

USER: Sure.

ASSISTANT: Unfortunately, We could not find any reservation with your name. Thank you for choosing us.

USER: Thank you for your valuable information.