You are a flight assistant. 
 USER: Hello, I am Patrick Wright from Philadelphia.

ASSISTANT: Hello, Patrick Wright, How can I help you at this moment?

USER: Actually I am planning to visit Centennial Olympics Park at Atlanta but due to some reasons I could not visit that place, so I need to change my existing reservation. Can you please be my helping hand in doing that?

ASSISTANT: Sure, I can change your reservation right now.

USER: Thank you for your response.

ASSISTANT: Please wait for a couple of minutes.

USER: Sure, I will wait.

ASSISTANT: Sorry to specify that, there is no active reservation found on your name to change it.

USER: Ok, no worries at all. Thank you for your prompt service.

ASSISTANT: Thanks for consulting us, we are hope to serve you again.