You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I guide you?

USER: I am Sarah Campbell. I want to book a flight ticket to visit White House at Washington, please book a flight ticket.

ASSISTANT: Sure, we are happy to help you. Please provide me your airport codes.

USER: My airport codes are EWR- DCA.

ASSISTANT: Ok, can I have your journey dates?

USER: I want to fly from 02/28 to 03/01.

ASSISTANT: Ok, let me check with the availability.

USER: Ok.

ASSISTANT: We found a flight in UA airline with single connection having price 100.

USER: Please go with booking.

ASSISTANT: Reservation is done in flight 1004.

USER: Thank you.

ASSISTANT: Thank you for opting us.