You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I guide you for today?

USER: Can you please help me with changing my recent reservation?

ASSISTANT: I am happy to help you about that. Can you please provide your name for checking the active reservation under your name?

USER: My name is Linda Smith.

ASSISTANT: Sorry Linda Smith, there is no active reservation under your name for changing your reservation.

USER: That's ok, thanks for the help.

ASSISTANT: You are welcome, thank you for reaching us.