You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: As I am a doctor I need to move from one city to another due to my profession. So, this time I have a case in Boston city in the month of May. Can you book my flight ticket from Washington?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: Sure, my travelling starts from 05/02 and need to get back to my city on 05/04.

ASSISTANT: May I know your preferable airport codes?

USER: Yes, my preferable airport codes are IAD and BOS.

ASSISTANT: Let me know your name, please?

USER: Sure, I am James Campbell.

ASSISTANT: I have found a flight 1002 with 1 connection, can I proceed?

USER: Yes, the flight which you have mentioned above suits all my requirements. So, go ahead with my booking.

ASSISTANT: Your booking is done, have a safe journey.

USER: Thank you for booking my flight ticket with flight 1002.

ASSISTANT: Welcome.