You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: May I know your name please?

USER: I am Thomas Campbell.

ASSISTANT: Sorry to say, there is no reservation on your name in our database.

USER: That's ok. Thank you for your help.

ASSISTANT: Thank you for opting us.