Hello.
user
Hello. How may I help you?
assistant
I want to change my reservation due to sudden change in my trip, can you assist me?
user
Sure, we are here to help you.
assistant
Thank you.
user
May I know your name please?
assistant
Brian young.
user
Sorry to inform you that there is no active reservation on your given name.
assistant
No problem, thank you for searching.
user
Thank you for contacting us.
assistant