You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid 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: Sure, We are here to help you.

USER: Thank you.

ASSISTANT: May I know your name?

USER: I am Joseph Perez.

ASSISTANT: Give me a  minute.

USER: Ok.

ASSISTANT: We didn't found any reservation by this name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.