You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Robert Campbell here.

ASSISTANT: How can I assist you at this moment?

USER: Owing an emergency, I want to cancel your reservation. Can you please help me?

ASSISTANT: Sure, I am happy to help you with that.

USER: Thank you.

ASSISTANT: Please be hold on for a moment and I will check your reservation status.

USER: Ok.

ASSISTANT: Thank you for waiting. Sorry Robert, no reservation has found under your name to cancel.

USER: It's ok, thank you for checking.

ASSISTANT: Most welcome. Thank you for choosing us, have a good day.