You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Earlier I made a reservation for my trip through an agent but, agent booked on wrong date. So, I request you to please change it to my actual date.

ASSISTANT: Please wait a while. May I know your name please?

USER: I am Dennis Martin.

ASSISTANT: Sorry to say, there is no reservation on your name in our database.

USER: Ok, no problem.

ASSISTANT: Thank you for opting us.

USER: Thank you.