You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid 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. May I know your name?

USER: I am Jennifer Clark.

ASSISTANT: There is no reservation found under your name.

USER: That's ok. Thank you.

ASSISTANT: Thank you for opting us.