You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Charles Jackson.

ASSISTANT: How may I assist you today?

USER: I just want to cancel my recent reservation, due to sudden demise of my grand mother. Could you please help me?

ASSISTANT: Sure, please wait for a couple of minutes.

USER: Sure.

ASSISTANT: Thanks for your time, no reservation found by your name in our database.

USER: Ok, no issues. Thank you for your service.

ASSISTANT: Thank you for availing us.