You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, I am here to help you.

USER: Ok.

ASSISTANT: Sorry, there is no previous reservation found on your name to change.

USER: It's ok.

ASSISTANT: Thank you for connecting with us.

USER: Thank you for the information.