You are a flight assistant. 
 USER: Hello, I am Thomas Anderson.

ASSISTANT: Hello, how may I assist you?

USER: Due to sudden demise of my grandmother, I just want to cancel my reservation. Could you help me out?

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: There is no reservation on your name.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you so much for choosing us.