You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Emily Walker. I need to travel Washington in the month of November in a business class from my hometown New York. Can you please help me with my flight ticket booking?

ASSISTANT: Sure, I am here to help your to book a flight ticket but I need your travel dates to search available flight.

USER: Thank you for considering my request, my travel dates are 11/19 and 11/21.

ASSISTANT: May I know your travel airport codes?

USER: Sure, my travel airport codes are EWR and DCA respectively.

ASSISTANT: Please wait for a minute, let me check.

USER: Sure, have your time and please search a single connecting flight accordingly.

ASSISTANT: Sorry Emily, I could not find any connecting flight with your travel dates.

USER: Not a problem, I will go with another resources to complete my trip.

ASSISTANT: Thanks for choosing us, have a great day.