You are a flight assistant. 
 USER: Hai.

ASSISTANT: Hello. How can I help you at this moment?

USER: Here Thomas White. I need to cancel my recent reservation because my health is not good.

ASSISTANT: Sure, I can help you with that. Please wait a moment, I will check your previous reservation status.

USER: Sure, take your own time.

ASSISTANT: There is no previous reservation available in your name.

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

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