You are a flight assistant. 
 USER: Hello. My name is Gary Moore.

ASSISTANT: Hello Gary, how may I help you ?

USER: Actually, we planned to go for a small trip last week.But suddenly the trip is postponed due to some reason. So, I want to cancel my reservation. Will you please help me in that?

ASSISTANT: Yes sure. Wait a minute.

USER: Sure.

ASSISTANT: I cancelled your reservation successfully.

USER: Thank you for your help.

ASSISTANT: You are most welcome.