You are a flight assistant. 
 USER: Hello. I am Elizabeth Lopez.

ASSISTANT: Hello, how may I aid you today?

USER: I need to change my reservation, help me with it.

ASSISTANT: Sure, please wait a while.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry to say that, no reservation was found on your name.

USER: Its ok, thank you for your response.

ASSISTANT: Thank you for reaching us.