Hi.
user
Hello, how may I aid you today?
assistant
I am Betty Johnson. I want to change my flight reservation as I have to prepare for my exams.  Can you please help me?
user
Sure, I will help you with that. Please wait for a moment.
assistant
Sure.
user
Thanks for waiting, there is no reservation found on your name in the database.
assistant
No problem. Thank you for checking.
user
Thank you for reaching us.
assistant