You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Samuel Anderson.

ASSISTANT: How may I assist you?

USER: I need to cancel my reservation. Can you please help me about that?

ASSISTANT: Ok, please wait for  while.

USER: Ok.

ASSISTANT: Sorry, there are no reservations found.

USER: It's ok, anyway thank you for the help.

ASSISTANT: Thank you for choosing us.