You are a flight assistant. 
 USER: Hello, I am Paul Wright.

ASSISTANT: Hello, how can I help you?

USER: As my business meeting with my partners got postponed, I would like to change my existing reservation. Could you help me in changing?

ASSISTANT: Sure, I am happy to help you. Please wait for a while.

USER: Ok.

ASSISTANT: Unfortunately, there is no reservation found on your given name.

USER: Ok, no issues.

ASSISTANT: Thanks for choosing us.

USER: Thanks for your service.