You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Mark Jones.

ASSISTANT: How may I lend a hand to?

USER: I want to book a ticket from DCA to DTW to attend seminar, can you help me in booking?

ASSISTANT: Mark, I am here to help you with that. When you are willing to travel?

USER: I am departing on 09/15 and return on 09/17.

ASSISTANT: Please wait for a moment.

USER: Sure, take your time.

ASSISTANT: There is a flight with Delta airlines and the ticket figure is 100. Would you like me to proceed for this?

USER: Please proceed for booking.

ASSISTANT: Mark, your ticket is reserved in economy class with the flight-1002.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting our agency.