Hello, I am Nicholas Collins.
user
Hello, how may I help you?
assistant
I would like to go to a event in Oakland, so could you please book a ticket for me?
user
Sure, I will help you. Please share your travelling dates.
assistant
I would like to go on 04/07 and return back on 04/09.
user
Please send your nearby airport codes.
assistant
My source and destination airport codes are DCA and OAK.
user
Please wait for a while.
assistant
Ok, ensure it is a single connecting flight.
user
Sorry, there is no flights available on your requested dates.
assistant
That's ok, thank you for checking.
user
You are welcome. Thank you for reaching us, have a nice day.
assistant
Welcome.
user