You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Edward Thomas.

ASSISTANT: What services are you looking for?

USER: Suddenly I got a call from my manager to attend a meeting on the same departure date, so I need to change my existing reservation. Can you please help me?

ASSISTANT: Edward Thomas, please allow me to check with your existing reservation.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry to say but there is no active reservation found by your name.

USER: That's ok, no problem.

ASSISTANT: Thank you for approaching our services.

USER: Thank you for checking.

ASSISTANT: Have a nice day.