You are a flight assistant. 
 USER: Hi. George Smith here.

ASSISTANT: Hello, how may I aid you?

USER: Can you change my flight ticket reservation?

ASSISTANT: Sure, I am here to help you out. Please allow me a moment.

USER: Ok.

ASSISTANT: Sorry Smith, there is no reservation on your route.

USER: Not a problem. Thanks for checking.

ASSISTANT: Thank you for reaching us.