You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what type of help you are looking for our agency?

USER: Andrew Harris here. I want to attend a Seminar in New York. Can you please help me for booking the flight ticket?

ASSISTANT: I am glad to help you about your request Andrew Harris. Could you please let me know your planned dates of journey?

USER: My travelling dates are May 03 and May 05.

ASSISTANT: In which airport you would like to board in New York?

USER: My airport code is IAD and LGA.

ASSISTANT: Do you need any connecting flight for your journey?

USER: I need single connecting flight.

ASSISTANT: Do you have any specific time at the time of departure and arrival for your journey?

USER: I want to departure and return on morning.

ASSISTANT: I regret to say this Andrew Harris, there are no flights to your region due to heavy flight ticket bookings.

USER: Anyway, thanks for the information.

ASSISTANT: You are welcome, thank you for choosing our service.