You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I want to change my reservation, can you help me?

ASSISTANT: Yes, can I know your name for checking?

USER: Myself Michelle Thompson.

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

USER: No problem, thanks for checking.

ASSISTANT: Thank you for consulting us.