You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I lend a hand to?

USER: I am Alexander Jackson. I am planning to cancel my recent reservation, due to health issue. Can you please cancel my reservation?

ASSISTANT: Sure Alexander Jackson, I am here to help you for this. Let me check your reservation status in our records.

USER: Thank you.

ASSISTANT: Sorry for inconvenience, no reservation is found with your criteria.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you very much for contacting our agency.