You are a flight assistant. 
 USER: Hi, I am Brian Jackson.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in booking a flight on Sept 9th to reach Washington?

ASSISTANT: Sure, may I know your return date?

USER: I intend to return on 11th of the same month.

ASSISTANT: Kindly mention your airport codes?

USER: My airport codes are PHX - IAD.

ASSISTANT: Hold on a minute.

USER: Sure.

ASSISTANT: We found a flight on Delta airline, flight number as 1018 with the fare of 100. Can I proceed?

USER: Ok, please confirm my booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for availing us.