You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Daniel Williams.

ASSISTANT: How may I help you?

USER: Can you help me to cancel my reservation?

ASSISTANT: Sure, I am glad to help you. please wait for a moment.

USER: Thank you. Sure, take your time.

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

USER: Thank you.

ASSISTANT: Thank you for reaching us, have a nice day.