You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. C. How can I help you today?

USER: I am Daniel Miller.

ASSISTANT: Daniel, what can I do for you?

USER: Unfortunately some work was assigned to me by my manager, so I cannot travel on my reservation date, can you help in cancel my reservation?

ASSISTANT: So sad, I will help you. Let me check with your details. Sorry Daniel, there is no reservation found under your name.

USER: That's ok. Thank you.

ASSISTANT: Would you like to know anything else?

USER: No, for now it's enough.

ASSISTANT: Thank you for reaching us.