You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Joseph Adams here.

ASSISTANT: How can I help you?

USER: Due to an emergency, I want to cancel my reservation. Can you please help me for that?

ASSISTANT: Ok, please wait.

USER: Ok, I will wait.

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

USER: Anyway, thanks for the information.

ASSISTANT: Thank you.