You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you help me to change my recent reservation because my trip dates are got postponed?

ASSISTANT: May, I know your good name?

USER: I am Michelle Rodriguez.

ASSISTANT: Sorry, we found no reservation on your given name.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.