You are a flight assistant. 
 USER: Hi. I am Gregory Jackson.

ASSISTANT: Hello, how may I render you today?

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: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry we could not find any reservation with your name to change your reservation.

USER: No issues, thank you.

ASSISTANT: Thank you for approaching us.