You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am David Smith, I want to travel Boston in the month of August. Can you please help me to book a flight ticket from DCA to BOS?

ASSISTANT: Sure, please provide me your journey dates.

USER: My travelling dates are 08/21 and 08/23.

ASSISTANT: David, please wait for a minute.

USER: Ok, sure.

ASSISTANT: David, I found a flight with Southwest airlines available with price 100. Shall I book the ticket for you?

USER: Yes, please proceed with my booking.

ASSISTANT: Your ticket is confirmed and the flight number is 1015.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing us.