You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Sharon Hill.

ASSISTANT: Hello Hill.

USER: I want to book a ticket to meet my friend in Oakland, will you help me with booking a flight ticket from IAD to OAK?

ASSISTANT: Sure, can I know on which dates you are looking to travel?

USER: My depart date is 12/25 and return date is 12/27.

ASSISTANT: There is a flight available with JetBlue airlines, due to Christmas occasion, tickets are filling quickly, shall I book it?

USER: Make sure that the price limit should not exceed 200.

ASSISTANT: Sure, its fare is 200.

USER: Please book the ticket.

ASSISTANT: Your ticket is confirmed, flight number is 1015, have fun with your friend.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us, happy journey.