You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Will you help me to cancel my recent reservation?

ASSISTANT: Yes, can you tell me your name?

USER: Myself Larry Walker.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: It's ok, thank you for checking.

ASSISTANT: Thank you for contacting us.