You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Betty Perez. I want to cancel my reservation because of health problem, can you help me?

ASSISTANT: Ok, let me check with your details.

USER: Ok, take your time.

ASSISTANT: Betty, sorry to inform you that there is no reservation found under your name.

USER: No problem.

ASSISTANT: Do you want any other service?

USER: No, thanks.

ASSISTANT: Thank you for reaching us.

USER: Thank you for checking.