You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you?

USER: Can you help me in changing the reservation due to postpone of my joining in office?

ASSISTANT: Sure, I would be happy to help you. Please wait for a while. To change your reservation, I need to know your good name?

USER: Ok. Raymond Anderson is my name.

ASSISTANT: Sorry there is no reservation found on your name.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thanks for connecting us and have a great day.