You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Myself Eric Evans. For some issues I want to change my reservation, can you please help me?

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for choosing our agency.