You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Joshua Lewis.

ASSISTANT: How may I assist you today?

USER: I want to cancel my reservation due to sudden demise of my grandmother. Can you cancel it?

ASSISTANT: Sure, I am here to help you. Please hold on a minute.

USER: Sure.

ASSISTANT: Thanks for being patient, there is no reservation found on your name.

USER: Ok, thank you for informing me.

ASSISTANT: Thank you for choosing us.