You are a flight assistant. 
 USER: Hi, I am David Allen.

ASSISTANT: Hello, how can I aid you today?

USER: As I am planning to attend a live concert in Washington, could you please help me to book a flight ticket with single connection?

ASSISTANT: Sure, we are here to make your journey comfort.

USER: Thank you.

ASSISTANT: Kindly mention your travel dates.

USER: I need to reach Washington on 02/18 and my return date will be on 02/20.

ASSISTANT: Could you please provide me your airport codes?

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

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: There is a flight with your requirement, airline is Hawaiian with price 100 and single connection.

USER: Everything is fine, you can proceed with the booking.

ASSISTANT: Your booking is done and flight number is 1010.

USER: Thank you for being my helping hand in booking.

ASSISTANT: Thanks for opting us, have a good day.