Hi.
user
Hello. How can I help you?
assistant
I am Debra Green, I have to attend my graduation ceremony on 10/20 in San Francisco, CA - SFO. can you please book my ticket?
user
May I know the source and return day?
assistant
I want to mention that, I have to be there one day before the event. I want to start from Washington DC - DCA and my return day is on 10/21. My depart day is on 10/19.
user
Sorry to tell that there is no flight found on your request.
assistant
OK, thanks for your service.
user
Thank you for contacting us.
assistant