You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am Donna Anderson.

ASSISTANT: Ok.

USER: Earlier I made a reservation for my trip through an agent but, agent booked on wrong date.

ASSISTANT: Ok.

USER: So, I request you to modify my reservation?

ASSISTANT: Sure, I will help you.

USER: Thank you for considering my request.

ASSISTANT: Please wait for sometime, I will get back to you with some information.

USER: Ok, I will wait.

ASSISTANT: Thanks for your precious time. But, there is no reservation found with your name to proceed with change in reservation.

USER: Ok, no issues.

ASSISTANT: Thank you for choosing us, Have a nice day.

USER: Thank you for your quick response.