You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you today?

USER: I am Jonathan Lopez. I want to cancel my reservation, can you help me in that?

ASSISTANT: Sure, I will help you with that. Please wait for a minute.

USER: Sure.

ASSISTANT: I am sorry to say that there is no reservation found.

USER: That's ok.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your help.