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

ASSISTANT: Hello, do you need any help from us?

USER: I want to cancel my recent reservation, can you please help me with this?

ASSISTANT: Sure, please wait for a while.

USER: Ok, take your time.

ASSISTANT: Sorry, there is no reservation with your name to cancel.

USER: Ok, not an issue. Thank you for your time.

ASSISTANT: Thank you for choosing us.