Hello.
Hello. How may I help you?
Due to sudden change in my trip dates I need to change my existing reservation. Can you help me changing my reservation?
Ok, I will help you with that before going to change your reservation I need your name to check it.
I am John Hall.
Sorry John Hall, there is no reservation found under your name to change it.
No problem, thank you for the information.
Thanks for contacting us.