You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Lisa Wright.

ASSISTANT: How can I serve you?

USER: Due to some health issue, I need to cancel my reservation. Can you help me in cancelling?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Thanks for being waiting.

USER: Ok.

ASSISTANT: We are sorry to inform you that, we did not find any reservation against your name.

USER: No problem. Thank you.

ASSISTANT: Thank you for consulting us.