You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you at this moment?

USER: I need to cancel my ticket due to health issue, can you help me with that?

ASSISTANT: Sure, may I know your good name?

USER: I am Benjamin Lopez.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no active reservation found on your name.

USER: That's ok. Thank you.

ASSISTANT: Thank you for choosing us.