You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Due to some health issue, I want to cancel my recent reservation. Can you please help me with this?

ASSISTANT: Sure, I am here to help you. Kindly share your name.

USER: Sure, I am Alexander Williams.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: Ok, Thank you.

ASSISTANT: Thank you for choosing us.