You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Shirley Turner. Due to some emergency problem, I need to cancel my reservation. Can you please help me?

ASSISTANT: Sure, please wait a minute.

USER: Sure.

ASSISTANT: Unfortunately we didn't found any reservation matching your name.

USER: No problem. Thank you.

ASSISTANT: Thank you for reaching us.