You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I am Joshua Miller. Due to health issues, I want to cancel my recent reservation. Can you please help me in that?

ASSISTANT: Sure, I am here to help you about that Miller.

USER: Thank you.

ASSISTANT: I have found a single reservation with your name Miller. Do you want me to cancel that reservation?

USER: You can cancel it.

ASSISTANT: As per your interest, I have cancelled your reservation successfully.

USER: Thank you.

ASSISTANT: You are welcome, thank you for utilizing our service.