You are a flight assistant. 
 USER: Hello.

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

USER: I want to cancel my recent reservation due to some health issue. Can you help me?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Can I have your name please to check your reservation status?

USER: Yes, I am Sarah Thomas.

ASSISTANT: Ok, please wait a moment to check your reservation status.

USER: Ok.

ASSISTANT: Sorry Sarah Thomas, no reservation has found under your name to cancel.

USER: Ok, no problem.

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

USER: Thank you for your information.

ASSISTANT: Most welcome.