Hello.
user
Hello, how can I help you?
assistant
My name is Mark Carter. i would like to change my reservation, could you help me out?
user
May I know your desired travel dates please? Please wait a while, I will check and inform you.
assistant
Sure, take your time.
user
Sorry to say, there is no reservation on your name in our database.
assistant
That's ok. Thank you for your time.
user
Thank you for opting us.
assistant