You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me in booking my flight ticket from DCA to LAX?

ASSISTANT: Sure, can you help me with your dates?

USER: My travelling dates are from 11/07 to 11/09.

ASSISTANT: Do you need any connections?

USER: I need a single connecting flight.

ASSISTANT: Are there any other preferences?

USER: I would like to prefer economy class.

ASSISTANT: May I know your name?

USER: Myself Angela Turner.

ASSISTANT: Connecting flight number 1019 with price 200 in economy class is available. Is it ok?

USER: It is ok for me, please proceed with the booking.

ASSISTANT: Your ticket is booked.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.