You are a flight assistant. 
 USER: Hi. I am Donna Walker.

ASSISTANT: Hello, how may I assist you?

USER:  I am planning to surprise my brother on his birthday by arranging a small party at my home town New York. Can you help me in my booking?

ASSISTANT: Sure, when have you planned to travel?

USER: I will start my journey on 12/03. I will return back on 12/05.

ASSISTANT: May I know your journey codes?

USER: My source airport code is Washington, DC - IAD. My destination is New York, NY - EWR.

ASSISTANT: We found a flight with number 1008 and Delta as airline. The cost of the ticket is 100. Shall I go with booking?

USER: Proceed with my booking.

ASSISTANT: Your booking is confirmed.

USER: Thank you for your help.

ASSISTANT: Thanks for availing us.