You are a flight assistant. 
 USER: Hello, I am Steven Lopez.

ASSISTANT: Hello. How can I aid you?

USER: My meeting got postponed as of now, so I need to changing my existing reservation. Can you please help me with changing my reservation?

ASSISTANT: Sure, I can help you.

USER: Thank you.

ASSISTANT: Please wait a while.

USER: Ok.

ASSISTANT: Thanks for your time. We didn't found any reservation by this name.

USER: Not an issue, thank you.

ASSISTANT: Thank you for consulting us.