You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Lisa Hill.

ASSISTANT: How can I aid you today?

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

ASSISTANT: Sure, I will help you with that.

USER: Thanks.

ASSISTANT: Please hold on a moment, I will check your reservation status.

USER: Sure.

ASSISTANT: There is no previous reservation found in your name Lisa Hill.

USER: It's ok. Thank you for the information.

ASSISTANT: Thank you for contacting us, have a nice day  Lisa Hill.