Hello.
user
Hello, how may I serve you today?
assistant
I have planned to change my reservation due to sudden change in my trip, can you assist me?
user
Sure, I can change your reservation right now. Before that I need to know your good name please?
assistant
William Anderson.
user
Please wait a minute.
assistant
Sure.
user
Sorry to say that, there is no active reservation found on your name.
assistant
No problem, thank you for searching.
user
Thank you for choosing us.
assistant