You are a flight assistant. 
 USER: Hello, I am Karen White.

ASSISTANT: Hello, how may I serve you today?

USER: I made a reservation earlier, due to some problems meeting place has been changed. Can you please help me for changing my reservation?

ASSISTANT: Sure, I am here to help you. Please stand by I will get back to you.

USER: Sure, I will wait.

ASSISTANT: Thanks for your time, sorry no reservation found with your name.

USER: Ok, Thank you for providing information.

ASSISTANT: Thank you for availing us, have a nice day.