Hello.
Hello, do you need any help from us?
I need to do some changes in my previous reservation so please help me with changing my reservation.
Ok, I will help you with that.
Thank you.
Could I have  your name please?
Sure, please check my reservation with the name Anthony Collins.
Ok, please allow me a moment.
Sure, take your time to check.
Sorry, there is no reservation with your name in our portal to make changes.
I will check my mail once more to get the information regarding confirmation of my ticket. Anyway, thank you for your time.
You are welcome, have a great day.