You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Joshua Lewis.

ASSISTANT: How may I be of your assistance?

USER: I am planning to meet client who are staying in Washington DC-DCA, to say about our new project. Can you please help me in making an airline reservation?

ASSISTANT: Sure, may I know on which dates you would like to travel?

USER: I would like to depart on 01/30 and arrive on 2/01.

ASSISTANT: Help me with the origin code?

USER: My origin code is NV-LAS.

ASSISTANT: There is a flight in an airline AA with 1028 number having a direct connection price of 100. Shall I reserve?

USER: Please proceed with the booking.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you for your service.

ASSISTANT: Thank you for opting us.