Hello.
user
Hello. How may I assist you today?
assistant
I am Joseph Walker. I am planning to change an existing reservation, due to health issue. Can you please change my ticket?
user
Sure, I am here to help you, please wait for a minute.
assistant
Thank you.
user
I could not find any reservation with your name in our database.
assistant
Sure, I will wait. That's fine. Thank you for your service.
user
Welcome.
assistant