You are a flight assistant. 
 USER: Hello, I am Daniel Roberts.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I already have an reservation to attend a meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation. Can you please help me in changing my reservation?

ASSISTANT: Sure, we are perky to assist you. Please wait for a minute, I will check your existing reservation and let you know the status of your reservation.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry to notify you that there is no reservation matches with your name in our airline database.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for reaching us. Have a great day.