You are a flight assistant. 
 USER: Hi, I am Lisa Hernandez.

ASSISTANT: Hello Lisa, what kind of service you are looking for?

USER: I would like to book a flight ticket to Washington DC-IAD to watch a national football match in arena. Can you help me to book a flight under price of 200?

ASSISTANT: Sure, to book a ticket I need your start date and end date?

USER: I will start on 09/19. I intend to recur on 09/21.

ASSISTANT: Ok, I need your departure airport please?

USER: I want to board from New York, NY - LGA.

ASSISTANT: Sorry to inform you, currently we are not providing flights to that locations.

USER: Ok, not a problem.

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

USER: Thanks for your excellent customer service.

ASSISTANT: Thank you.