You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you at this moment?

USER: I would like to book a ticket from DCA to LGA, can you please help me out?

ASSISTANT: Sure, I am happy to help you with that. Can I have your travel  dates please?

USER: I am travelling on these dates Aug 19th and 21st.

ASSISTANT: Ok, please let me know your good name.

USER: Alexander Nelson here.

ASSISTANT: Do you have any specifications?

USER: I need single connected flight.

ASSISTANT: Delta airlines running a flight in your route with connection 1 and the ticket fare is 100 in  economy class. Shall I proceed with booking?

USER: Ok, you can proceed.

ASSISTANT: Ok, your ticket booking has done and the flight number is 1019.

USER: Thank you for your services.

ASSISTANT: Thank you for choosing us, have a great journey.