You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Benjamin Nelson here.

ASSISTANT: Nelson, how may I help you?

USER: Can you change my flight ticket reservation? As my wedding date have been postponed in which was to be held in a church in New York.

ASSISTANT: Sure Nelson, I will help you. Let me check the status in our database.

USER: Ok.

ASSISTANT: Nelson, sorry for inconvenience there are no reservation found on your name in our database.

USER: Ok, that is not a problem. Thank you for checking.

ASSISTANT: Thank you Nelson for approaching us.