You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Kenneth Clark here.

ASSISTANT: How can I help you today?

USER: I am sick, please cancel my reservation.

ASSISTANT: Sure, I am glad to help you. Please wait for a moment.

USER: Thank you for your positive response. I will be waiting.

ASSISTANT: Thanks for waiting.

USER: No issues.

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

USER: Oh! That's very sad to hear from your side. Thank you for checking anyways.

ASSISTANT: Thank you for contacting us.

USER: You are welcome.