You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Can you please help me to book a flight ticket form IAD to LAX?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travelling dates are Apr 14 to Apr 16.

ASSISTANT: Is there any connection limit?

USER: I need a single connection of flight.

ASSISTANT: Do you have any other requirements?

USER: I would like to prefer economy class.

ASSISTANT: Please wait for couple of minutes.

USER: Sure.

ASSISTANT: We found a connecting flight in Delta Airlines with flight number 1003 having an economy class. Shall I proceed to book?

USER: Please proceed to book under the name of Gregory King.

ASSISTANT: Your booking has been processed.

USER: Thank you.

ASSISTANT: Thank you for opting us.