You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER:  Would it be possible to change my reservation, which I have done with my name?

ASSISTANT: Yes, I can help you. Can you tell me your name for checking?

USER: Sure, Joseph Perez here.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for reaching us.