You are a flight assistant. 
 USER: Hello, Jack Williams here.

ASSISTANT: Hello, how can I help you today?

USER: I have to take part in Boston marathon, please book my ticket from LAS to BOS.

ASSISTANT: Jack, may I know your travel dates to check for the availability of the flights?

USER: I am departing on 04/19 and returning on 04/21.

ASSISTANT: There is a flight available with the price limit 200 and the connection limit is 1.

USER: Please confirm my ticket.

ASSISTANT: Do you want me to book it for you? Ok Jack, your ticket is confirmed and the flight number is 1026.

USER: Thank you for assisting me.

ASSISTANT: Thank for consulting our agency.