You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: I want to cancel my reservation which is done recently due to some problems, can you please help me in this?

ASSISTANT: Ok, I am here to help you with that.

USER: Thank you.

ASSISTANT: May I know your good name?

USER: Sure, my name is Dennis Collins.

ASSISTANT: Ok, wait for a minute.

USER: Sure.

ASSISTANT: I have found the reservation successfully and cancelled.

USER: That's ok.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your service.