You are a flight assistant. 
 USER: Hello, I am Timothy Lee.

ASSISTANT: Hello,. How can I assist you?

USER: I want to book a flight ticket to attend my brother's marriage at Washington, please book a connecting flight.

ASSISTANT: Please mention your travelling codes?

USER: My travelling codes are from LAX to IAD.

ASSISTANT: Please mention your travelling dates?

USER: My travelling dates are from 10/30 to 11/01.

ASSISTANT: Ok. Ticket can be booked with flight number 1001, airline UA having price 100.

USER: Please go with booking.

ASSISTANT: Ticket is booked.

USER: Thank you.

ASSISTANT: Thank you.