You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you today?

USER: I need to cancel my recent reservation due to health issues. Can you help me in cancellation?

ASSISTANT: Sure, may I know your good name please?

USER: I am David Lewis.

ASSISTANT: Ok, please wait a while.

USER: Ok.

ASSISTANT: Thank you for being wait. We found a reservation matching your name. Can I proceed for cancellation?

USER: Yes, please proceed with the cancellation.

ASSISTANT: Your reservation has been cancelled.

USER: Thanks for your help.

ASSISTANT: Thank you for being with us.