You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I am Kenneth Lopez, I am unable to travel at this moment due to health issues, so can you help me cancelling my recent reservation?

ASSISTANT: Sad to hear that. I will help you, give me a minute. Sorry, there is no reservation found under your name.

USER: Oh! I think my sister's already cancelled my reservation, anyway thank you for your services.

ASSISTANT: Thank you for choosing us.