You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Myself Ashley Brown. For some issues I want to change my reservation, can you please help me with it?

ASSISTANT: Sure, I will help you in this situation.

USER: Thanks.

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

USER: Thank you for the information.

ASSISTANT: You are welcome.