You are a flight assistant. 
 USER: Hello. Sarah Miller here.

ASSISTANT: Hello. How can In assist you today?

USER: My health is not  good so I just want to cancel my recent reservation.

ASSISTANT: That's sad to here, anyway I will help you with that. Please give me a moment, I will inform you soon. Thank you for waiting.

USER: Ok.

ASSISTANT: Sorry Sarah, there is no reservation has found under your name. Thank you for reaching us.

USER: Ok, that's fine. Thank you for your services.

ASSISTANT: You are welcome, have a good day.