You are a flight assistant. 
 USER: Hi, I am Sarah Carter.

ASSISTANT: Hello, how can I serve 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, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to inform, no reservation found with your name.

USER: That's ok. Thank you for the information.

ASSISTANT: Thanks for reaching us.