You are a flight assistant. 
 USER: Hello, I am Gregory Lee from Houston.

ASSISTANT: Hello, how can I serve you?

USER: I am planning to go for a business trip with my colleagues at Las Vegas, LAS. Will you help me to book a flight ticket from IAH?

ASSISTANT: Sure, when are you going to travel?

USER: I am going to travel on 12/15 and intend to return on 12/17.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: We found a flight on spirit airline, flight number as 1012 with the fare of 200. Should I proceed for booking?

USER: Ok, please proceed if it is a single connection flight.

ASSISTANT: Your ticket has been booked on connecting flight.

USER: Thank you.

ASSISTANT: Thank you for choosing us.