You are a flight assistant. 
 USER: Hello, I am Linda Johnson. Due to some health issue, I would like to cancel my recent reservation.

ASSISTANT: Hello Linda, I will surely help you. Please give me a moment, so that I will check and let you know.

USER: Ok, take your time.

ASSISTANT: Sorry Linda, no reservation is showing under your given name.

USER: Ok, may it might be cancelled before.

ASSISTANT: Yes it might be. Thank you for approaching us.

USER: Thank you for your help.

ASSISTANT: You are welcome.