You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, may I know your name please?

USER: I am Carol Anderson.

ASSISTANT: Wait a while, kindly.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found for the user name in our back end to cancel it.

USER: That's ok. Thank you.

ASSISTANT: Thank you for reaching us.