You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I be of your assistance?

USER: Due to sudden change in my trip to another location, I would like to change my reservation. Can you please help me update my reservation which was made on the name of Anna White?

ASSISTANT: Sure, we are here to help you out. Can you please wait for a moment, I will check with your reservation.

USER: Sure.

ASSISTANT: Thanks for your time. I have checked in reservation list to change your reservation, but could not find any reservation with your name.

USER: That's fine. Thank you for the response.

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