You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: George Perez here.

ASSISTANT: How may I lend a hand to?

USER: I have to go Washington for my film shooting purpose, can you please book a flight ticket from ATL to IAD?

ASSISTANT: Perez, I am here to help you. When you are planning to boarding?

USER: Ok, my itinerary dates are 12/08 and 12/10.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Perez sorry for inconvenience, no flights are available with your criteria.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you Perez for utilizing our agency.