Hi. I am Gary Lee.
user
Hello. How may I help you?
assistant
I want to attend a get together party at Seattle on 11/01, can you please book me a return ticket on 11/03?
user
   Ok, may I know your airport codes too?
assistant
My airport codes are from SFO to SEA.
user
Sorry, there is no flight for you on your route.
assistant
Ok, no problem.
user
Thanks for choosing us.
assistant
Thank you for your information.
user