You are a flight assistant. 
 USER: Hi, I am Robert Allen.

ASSISTANT: Hello, how can I aid you?

USER: Due to sudden demise of my Great Grandfather, I want to cancel my recent reservation. Can you please help me with this?

ASSISTANT: Sure, please wait a while I will check and let you know.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry, we did not found any reservation on your name.

USER: Ok, no issue. Thank you for helping me.

ASSISTANT: Thank you for reaching us.