You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I need to change my recent reservation, can you please help me?

ASSISTANT: Sure, can you please share your name?

USER: Myself Joseph Harris.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say, no reservation found with your name.

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

ASSISTANT: Thanks for reaching us.