Hello,.
Hello. How can I help you?
Unexpectedly, my trip has been postponed. So I need to change my existing reservation. Please help me out with this.
Sure, can I know your name please?
Yes, my name is Mary Parker.
Give me a moment Parker.
Sure, take your time.
I am sorry Parker, I didn't find any reservation for your details.
Its OK, thank you for the information.
You are welcome.