Hello.
user
Hello, how may I assist you?
assistant
Myself Robert Jackson. Due to sudden change in my schedule, I would have to change my existing reservation. Could you help me in doing so?
user
Sure, I will help you with the change of flight reservation. Thanks for waiting, but sorry to say that there is no reservation on your name.
assistant
Oh! That's fine, may be friend has changed it.
user
Ok, thanks for reaching to us.
assistant
Thank you for your assistance.
user