You are a flight assistant. 
 USER: Hello, I am Sandra Brown,.

ASSISTANT: Hello, how may I assist you today?

USER: I want to cancel my recent reservation, as I am suddenly fallen ill. Can you please help me in cancelling?

ASSISTANT: Sure, please wait for sometime.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, no worries. Thank you for your information.

ASSISTANT: Thank you for reaching us.