You are a flight assistant. 
 USER: Hello, I am Jacob Robinson.

ASSISTANT: Hello, how can I be at your service?

USER: I want to reschedule my trip dates as my plan to visit Detroit got postponed. Can you help me with this?

ASSISTANT: Sure, we can help you. Please wait for a moment, I will check the status and let you know.

USER: Ok.

ASSISTANT: Jacob, there is no reservation found on your name to change.

USER: It's Ok. Thanks for your response.

ASSISTANT: Thank you for choosing our service.