Hello.
user
Hello, how may I help you at this moment?
assistant
I am Gregory Walker. I want to make some changes in my flight reservation as my trip got postponed. Can you please help me?
user
Sure, I will help you. Please wait for a moment.
assistant
Thank you. I will wait for your reply.
user
Sorry, there is no reservation existing on your name.
assistant
Not an issue. Anyway, thank you for checking.
user
You are welcome, have a nice day.
assistant