You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to attend a seminar in Phoenix. Can you please help me for booking the flight ticket?

ASSISTANT: Yes, can you tell me your dates of travel?

USER: My travelling dates are Apr 13 and Apr 15.

ASSISTANT: Can you share me your nearest airport codes?

USER: My airport codes are LAS and PHX.

ASSISTANT: Do you have any preferences?

USER: I prefer single connecting flight.

ASSISTANT: I have found an economy class ticket with a price of 100 and it is a direct flight.

USER: Please proceed for booking the flight ticket.

ASSISTANT: Can I know your name for booking?

USER: My name is William Brown.

ASSISTANT: Your ticket has been booked.

USER: Thanks for helping me.

ASSISTANT: Thank you for reaching us.