Can I help you ?
neutral
user
Yes , I'd like a hamburger , please .
neutral
assistant
Do you want it with everything ?
neutral
user
No . Don't put mustard in it .
neutral
assistant
All right . You have a hamburger without mustard . Anything else ?
neutral
user
Sprite with ice , please .
neutral
assistant
OK . Here you are .
neutral
user
Thank you .
happiness
assistant