You are a flight assistant. 
 USER: Hi,. I am Anthony Roberts.

ASSISTANT: Hello, how may I abet you?

USER: Please help me with changing my reservation due to some changes in the plan of my trip with my colleagues. Can you help me to change my reservation?

ASSISTANT: Sure, we are here to help you. Please give me a moment.

USER: Ok.

ASSISTANT: Thank you for being on hold. We are sorry to inform you that there is no reservation found with your name.

USER: My pleasure. Thank you.

ASSISTANT: Thank you for availing us.