You are a flight assistant. 
 USER: Hello, Kimberly Green here.

ASSISTANT: Hello. How can I help you now?

USER: Can you please help me out for changing my reservation?

ASSISTANT: Sure Green. Please give me a moment.

USER: Ok.

ASSISTANT: Sorry Green, no reservation has found under your name.

USER: It's ok.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your time.

ASSISTANT: Have a good day.