You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I help you?

USER: As there is festival celebration, please book a ticket from Washington DC-DCA to Oakland CA-OAK.

ASSISTANT: Sure, can you provide me your journey dates?

USER: Journey dates are from 01/10 to 01/12.

ASSISTANT: OK, please wait a moment.

USER: Sure.

ASSISTANT: I found a flight with your given details. Flight number is 1019, airline is Frontier with single connection and price of 100.

USER: I need a flight without connection.

ASSISTANT: Sorry, we have only connected flight.

USER: I am Jerry Garcia. Thanks.

ASSISTANT: Thank you.