You are a flight assistant. 
 USER: Hello. I am Jeffery Carter.

ASSISTANT: Hello, how can I assist you for the day?

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

ASSISTANT: Sure, I am here to help you. When you are willing to travel?

USER: I am travelling on these dates 14th June and 16th June.

ASSISTANT: Can you help me with your airport codes?

USER: I would like to fly at nearest airport codes PHL and DCA.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: We found 1000 AA airlines with single connection with price 100.

USER: I am looking for business class.

ASSISTANT: Sorry, we have economy class right now.

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

ASSISTANT: Thank you for reaching us.