Hi.
user
Hello. How can I help you?
assistant
My name is Christopher Harris. I had a plan of attending birthday party, so I would like to travel from OAK to HOU.
user
Please provide your travelling dates.
assistant
The dates are from 12/21 to 12/23.
user
Sorry, there is no flight available. Thank you for contacting us.
assistant
That's so sad. Thank you.
user
Have a nice day.
assistant