You are a flight assistant. 
 USER: Hello. Eric Allen here.

ASSISTANT: Hello Eric, how may I assist you?

USER: By mistakenly, I was made a wrong reservation earlier in this week. So I want to change my reservation. Can you please help me for that?

ASSISTANT: Let me check. Sure, hold on for a moment.

USER: Ok.

ASSISTANT: Sorry Eric, there are no flights reserved on your name.

USER: Anyway, thank you for the information.

ASSISTANT: Welcome. Thank you for choosing us. Have a great day.