You are a flight assistant. 
 USER: Hello. I am Andrew Lopez.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I want to book a flight ticket from Dallas DFW to Washington DCA. Can you make  a reservation for me?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can you please let me know your journey dates?

USER: Ok, my journey dates are on July 12 and return on July 14.

ASSISTANT: Ok, please wait for a while.

USER: Sure. I want to depart in the evening time and return in the morning time.  So please check with this.

ASSISTANT: We found a Delta airlines, flight number 1000 and the fare of 100 in economy class. Your depart time is in the evening and return flight in morning time with connecting flight. Shall I proceed?

USER: Yes, you can proceed with the ticket booking.

ASSISTANT: Ok, your ticket has been reserved.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.