You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I would like to book a flight ticket to DC to visit Olympic National Park, could you please help me to book a flight ticket with single connection?

ASSISTANT: Sure, may I know your name?

USER: I am Jack Roberts.

ASSISTANT: May I know your travelling dates?

USER: Sure, I need to depart on 03/02 and my return date will be on 03/04.

ASSISTANT: May I know your airport codes?

USER: My source and destination airport codes are BOS and IAD.

ASSISTANT: Do you need a single connecting flight?

USER: yes, I need it.

ASSISTANT: There is a flight of United airline, flight number 1000 with the fare of 100.

USER: Ok, please proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your assistance in booking.

ASSISTANT: Thank you for reaching us.