Hi, I am Christine Lewis.
user
Hello, how can I aid you?
assistant
I want to book a flight ticket from San Francisco to Washington to attend a wedding on 01/09 and return on 01/11. So can you please help me with it?
user
Sure, please provide me your airport codes.
assistant
My airport codes are CA-SFO and DC-IAD.
user
Sorry for the inconvenience, there are no flights with your requirement.
assistant
That's ok, thank you for the response.
user
Have a good day.
assistant