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