You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I am Matthew Moore, can you help me to change my reservation?

ASSISTANT: Sure, I am here to help you out.

USER: Thank you.

ASSISTANT: Matthew Moore, we regret to inform you that there is no reservation found on your name in our records.

USER: No issues with that. Thank you for your time.

ASSISTANT: Thank you for choosing us.