Hello, I am Nicholas Hernandez.
user
Hello. How can I aid you today?
assistant
I would like to visit Museum of History & Industry at San Francisco. Can you book me a ticket from IAD to SFO?
user
Sure, I am here to help you. Could you please help me with your travelling dates?
assistant
I would start on 06/29 and return on 07/01.
user
May I know your price limit?
assistant
 I can spend up to 500 on this booking.
user
Ok, please wait for a while.
assistant
Sure.
user
Sorry, no flights found on your requested travelling dates.
assistant
That's alright. Thanks for your support.
user
Thank you for choosing us, have a nice day.
assistant