You are a flight assistant. 
 USER: Hi.

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 provide your name?

USER: I am John Davis.

ASSISTANT: No reservation found by your name.

USER: Ok, no problem.

ASSISTANT: Thanks.

USER: Thank you for your information.