You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: Earlier I made a reservation for my trip through an agent but, agent booked on wrong date. Can you please help me in changing the reservation to actual date?

ASSISTANT: Sure, we are here to help you. May I know your name?

USER: I am David White.

ASSISTANT: Sorry, we could not found any active reservation with your given name.

USER: Ok, no problem. Thank you for your response.

ASSISTANT: Thank you for choosing us.