You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I am Paul Lopez.

ASSISTANT: Nice meeting you Paul. Welcome to flight booking agency.

USER: I would like to book a ticket to Washington DC for business meet, can you please help me out?

ASSISTANT: Sure, I am oblige to help you. Can you please provide your preferable dates of travelling?

USER: I am travelling on these dates 10/30 and 11/01.

ASSISTANT: Ok, may I know your origin and destination airport codes for booking?

USER: I am flying from IAH to IAD.

ASSISTANT: Please wait a moment to check the flights.

USER: Ok, take your time.

ASSISTANT: Sorry to inform you that, there are no flight moving to your region with your planned dates.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for reaching us, have a great day.