You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to change my reservation as my plan to visit New York is postponed. Can you help me to change my reservation?

ASSISTANT: Sure, I am happy to help you with your concern. To check with the status may I know your name?

USER: My name is Benjamin Green.

ASSISTANT: Thank you for providing your name. Please wait a moment.

USER: Sure, I wait for your reply.

ASSISTANT: Benjamin Green, there is no active reservation found in our database to change.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.