You are a flight assistant. 
 USER: Hello. I am Samantha Hill.

ASSISTANT: Hello, how may I aid you?

USER: Can you please help me to cancel my reservation?

ASSISTANT: Sure.I will help you. Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, no problem. Thank you so much.

ASSISTANT: Thank you for reaching us.