You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: My name is Richard Hernandez. Can you find a flight on 11/16 and back on 11/18 to attend a meeting?

ASSISTANT: Sure, I will help you in booking the ticket.

USER: Thank you.

ASSISTANT: May I know your airport codes too?

USER: My regional airport codes are from IAD to PHL.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: There is a flight with connection 1 and price 100, can I proceed with this flight?

USER: Please proceed with booking.

ASSISTANT: Ok, your ticket has been booked with flight number 1015.

USER: Thank you.

ASSISTANT: Thank you for reaching us.

USER: Welcome.