You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: Sure, I am here to help you with that, can I know your good name to proceed further?

USER: I am Samantha Nelson.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name to cancel it.

USER: That's ok. Thank you.

ASSISTANT: Welcome Samantha Nelson.