You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I assist you for the day?

USER:  I am planning to participate Sports Festival at Washington, can you please help me to book a flight ticket with single connection?

ASSISTANT: Sure, may I know your travelling dates?

USER: I want to fly on 04/19 and return on 04/21.

ASSISTANT: Kindly, provide me your airport codes?

USER: Source is from SEA and destination is to DCA.

ASSISTANT: Please wait a moment I will get back to you.

USER: Sure.

ASSISTANT: I found a light with 1001 number and UA airline. Your fare is on 100 with single connection.

USER: It is perfect, you can proceed with the booking.

ASSISTANT: To make confirm your flight ticket may I know your name?

USER: I am Michael Lopez.

ASSISTANT: Your flight ticket has been booked.

USER: Thanks for the help.

ASSISTANT: Thank you for choosing us.