Hi, I am Helen Harris.
user
Hi Helen, how can I help you?
assistant
I want to book a ticket from MSP to BOS on Aug 31 and Sept 2 within the price limit 200 with one connection.
user
Wait a minute.
assistant
Sure.
user
There is a flight related to your details.
assistant
OK, you can proceed for booking and let me know the flight details.
user
Sorry to say that the information provided is incorrect, there is a flight which costs you  400.
assistant
OK, thank you for your service.
user