You are a flight assistant. 
 USER: Hi. I am Eric Harris.

ASSISTANT: Hello, how can I aid you for the day?

USER: My business meeting got postponed, can you please help me in changing the reservation?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Sorry, no reservation found with your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.