Hello, I am Jacob Green.
user
Hello. How can I serve you?
assistant
 Will you help me to book a flight ticket from SEA to IAD to meet my school friend after a long time?
user
Sure. May I know your travelling dates?
assistant
My depart is on 12/04 and return on 12/06.
user
Do you have any preferences?
assistant
My price limit is 5000.
user
Thanks for your details. There is no flights found on your data.
assistant
No problem, thank you.
user
Thanks for choosing us.
assistant