You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

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

ASSISTANT: Sure, I am glad to help you. Please wait for a while.

USER: Sure.

ASSISTANT: May I know your name?

USER: Myself Larry Collins.

ASSISTANT: Sorry Larry, there is no reservation have been found under your name in our database to cancel it.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for reaching us.