You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I be at your assistance?

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 please?

USER: I am Andrew Thompson.

ASSISTANT: Wait a while, kindly.

USER: Sure.

ASSISTANT: Sorry, no reservation found in your name to cancel.

USER: That's ok. Thank you.

ASSISTANT: Thank you for reaching us.