You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Myself Virginia Martin. I want to change my existing reservation.

ASSISTANT: Sure Martin, please give me a minute to check.

USER: No issues.

ASSISTANT: Thank you for waiting, sorry to inform you that there is no reservation on your name.

USER: OK. Thank you.

ASSISTANT: Thank you for reaching us, have a nice day.