You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I would like to visit Boston, can you please help me to book a flight ticket from DCA to BOS?

ASSISTANT: Sure, can you give me your trip dates?

USER: Sure, my travelling dates are June 03 and June 05.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Are there any other preferences?

USER: No.

ASSISTANT: May I know your name?

USER: My name is Jessica Young.

ASSISTANT: Flight number 1003 with price 100 in economy class, with single connection is available. Is it ok?

USER: Ok, please book.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.