Hello.
Hello. How may I help you today?
I want to change my existing reservation. Could you help  me with that?
Sure, I am here to assist you with this. Can you please provide your name to check your reservation status?
I have booked the ticket on my name Andrew Scott.
Please hold on a moment.
Ok.
Andrew Scott, there is no active reservation found under your name in our database.
That's ok, no problem. Thank you.
Thank you for contacting us.