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

ASSISTANT: Hello. New York Airline, Good Afternoon, how may I assist you?

USER: My business meeting is postponed, so I want to change my existing reservation. Can you help me?

ASSISTANT: Sure, I will help with that. Please wait for a minute to check the reservation details.

USER: Ok.

ASSISTANT: Roberts sorry, We would like to inform you that as per our records, your reservation was not with this name.

USER: No problem, thank you for your time.

ASSISTANT: Do you want any more help from us?

USER: No, thank you.

ASSISTANT: Thanks for contacting us, have a great day.