Hello, I'm Patrick Lewis.
user
Hello. How may I help you Lewis.
assistant
 I would like to spend my free time with my family members in PHL, will you please help me to get flight ticket?
user
Sure, I will help you to book.
assistant
Thank you.
user
Please provide me your source airport code for further proceeding.
assistant
My source airport code is DCA.
user
Ok, may I know your travelling dates?
assistant
I would like to travel on 10/09 and return back on 10/11.
user
Ok, wait a second.
assistant
Sure.
user
Sorry Lewis.We didn't found any flight for your requirements.
assistant
That's ok, thank you.
user
Welcome. Thank you for choosing us.
assistant