You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Katherine Clark. I would like to cancel my recent reservation, due to health issues. Can you please help me?

ASSISTANT: Sure, please wait for a while.

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

ASSISTANT: There is no reservation found on your name.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for choosing us.