You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Myself Margaret Nelson. I want to cancel my recent reservation due to some health issues, can you me in that?

ASSISTANT: Sure, please wait for a while.

USER: Thank you. I will wait for your response.

ASSISTANT: Sorry, no reservation found on your given name.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for choosing us.