You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Kimberly Turner.

ASSISTANT: How can I help you today?

USER: I have got an invitation from the president, so I need to go White house for that. Please help me with booking a flight ticket to Washington, DC - IAD.

ASSISTANT: Sure, I can help you in that. May I know your source airport code please?

USER: Sure, my source airport code is EWR.

ASSISTANT: Ok, may I know on which dates are you planning your journey?

USER: I am planning to start my journey on 04/20 and return back on 04/22.

ASSISTANT: Hawaiian airlines is having a flight on that route with travel charge of 300, shall I proceed for booking?

USER: Yes, you can proceed for further.

ASSISTANT: Your ticket has been booked with flight-1011, have a safe journey.

USER: Thank you for your assistance.

ASSISTANT: Thank you choosing our service.