You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist 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: Yes, can you tell me your name for checking?

USER: I am Frank Lee.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for consulting us.