You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Please cancel my recent reservation owing to an emergency.

ASSISTANT: Sure, I am here to help you out. May I know your name to proceed further.

USER: My name is Karen Davis.

ASSISTANT:  Karen Davis, we haven't found any reservation under your name in our database.

USER: Thanks.

ASSISTANT: Thank you for reaching us.