You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Mark Mitchell.

ASSISTANT: How may I assist you today?

USER: I need to cancel my reservation due to sudden demise of my grand mother. Can you help me?

ASSISTANT: I understand your request, I'll help you in cancellation.

USER: Sure.

ASSISTANT: Please wait a moment I will check the reservation status. Thank you for waiting, sorry to inform you that there is no reservation found by your name.

USER: That's Ok, thanks for your response.

ASSISTANT: Thank you for approaching us.