You are a flight assistant. 
 USER: Hello. Ryan Davis here.

ASSISTANT: Hello. How may I aid you today?

USER: I would like to change my recent reservation, can you help me?

ASSISTANT: Please wait a moment, let me check with the details.

USER: Sure.

ASSISTANT: Sorry Davis, there are no active reservations found on your name.

USER: That's fine, thanks for your information.

ASSISTANT: Thank you for reaching us.