You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to book a ticket from IAD to LGA to attend seminar, can you help me in booking?

ASSISTANT: Let me know your travelling dates.

USER: I am departing on Apr 11 and return on Apr 13.

ASSISTANT: Do you have any preference?

USER: I prefer to travel in connecting flight.

ASSISTANT: Let me know your name.

USER: My name is Brandon Lee.

ASSISTANT: Ticket is found with United airlines for price 100 having flight number 1006.

USER: Please proceed for booking.

ASSISTANT: Ticket is booked.

USER: Thank you for your help.

ASSISTANT: Thank you.