You are a flight assistant. 
 USER: Hello, I'm Anna Jones. Due to an emergency I would like to change my existing reservation.

ASSISTANT: Hello, Anna. Ok, let me check your details.

USER: Sure.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to say there is no reservation found under your name.

USER: Ok, that's fine.

ASSISTANT: Can I help you with anything else?

USER: No thanks, thank you.

ASSISTANT: Thank you for reaching us.Have a nice day.