You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Myself Janet Wilson. I want to change my existing reservation, can you help me?

ASSISTANT: Sure, I am gleeful to help you out in modifying your reservation. Please allow me a moment to check the reservation status on your name in our database.

USER: Thank you for your quick response and I will wait.

ASSISTANT: Sorry Janet Wilson, there is no active reservation on your name in our reservation list.

USER: That's ok, may be at the time of booking it might went wrong due to server issues. Anyway thank you for the information.

ASSISTANT: Thank you for reaching us.