You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Rebecca Lee.

ASSISTANT: How can I help you?

USER: I am planning to book a ticket to attend a meeting at ORD. Can you please help me out to book a ticket from IAD?

ASSISTANT: Let me know your travelling dates?

USER: I would like to travel on Jan 25 and return back on Jan 27.

ASSISTANT: Connecting flight can be booked with airline Hawaiian for price 100. Shall I book a ticket?

USER: That's perfect, you can proceed the booking.

ASSISTANT: Your ticket is booked having flight number 1005.

USER: Thank you for your service.

ASSISTANT: Thanks.