Hi.
user
Hello. How may I help you?
assistant
My friend have an interview on 12/10 in Boston, MA - BOS. So I would like to book a flight ticket with his name Helen Turner. Can you help me to book ticket?
user
Sure, I am here to help  you. May I know the boarding point and the journey date?
assistant
Sure, my boarding point is Dallas & Fort Worth, TX - DFW. I want to mention that, I prefer to go one day before my interview. So I want to start on 12/09.
user
Please wait for a minute.
assistant
My return day to be on 12/11. Ok, I will wait.
user
Thanks for being patient. There are no flights found according to your specifications.
assistant
Please check once again, make sure that my return day to be on 12/11.
user
Sorry  there are no flights.
assistant
OK, thanks for providing the information.
user
Thank you for contacting us.
assistant