You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Gregory Green.

ASSISTANT: How may I help you?

USER: I need to meet my old friends in IAD, can you help me out in booking a ticket from EWR?

ASSISTANT: Sure, please tell me your journey dates.

USER: My travel dates are from 11/18 to 11/20.

ASSISTANT: Gregory Green, there is a flight available for you with number 1006. Airline is Frontier, can I proceed booking?

USER: Please book the ticket.

ASSISTANT: Your ticket has been booked. Have a good time with your friends.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.