Hello. I am Nancy Clark.
user
Hello, how may I help you today?
assistant
I am planning to visit Millennium Park at Chicago, could you please help  me with booking a flight ticket from SEA to ORD?
user
Sure, may I know your travelling dates?
assistant
I would like to depart on Dec 30th and return on Jan 1st.
user
May I know your class?
assistant
I am comfortable with any class. And make sure that my depart time is afternoon.
user
Sure, wait a minute.
assistant
Sure, take your time.
user
There are no flights available.
assistant
Ok, not an issue. Anyways, thank you for the information.
user
Thank you for reaching us.
assistant