You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Sandra Thompson.

ASSISTANT: How can I assist you?

USER: I would like to cancel my reservation, can you please help me out?

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, I did not find any reservation on your name.

USER: Ok no problem, thank you for your services.

ASSISTANT: Most welcome.