You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help 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 existing reservation, can you help me in that?

ASSISTANT: Sure, I am here to help you. May I know your name to proceed further?

USER: Sure, the ticket has been reserved on the name Catherine Roberts.

ASSISTANT: Please wait a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for waiting. Catherine Roberts, regret to inform that there is no active reservation found under your name to amend.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for connecting us.