You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Larry Williams here.

ASSISTANT: What service that you are seeking from our agency?

USER: I would like to participate in Robotics competition in Houston. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I am oblige to help you. Can you please provide your preferable planned dates of travelling?

USER: My departure date is 04/19 and return date is 04/21.

ASSISTANT: Ok, may I know your origin and destination airport codes for booking?

USER: My airport codes are from LGA to IAH.

ASSISTANT: Please wait a moment to check the flights availability.

USER: Ok, I will wait.

ASSISTANT: According to your information, I have found a flight with 0 connections with a minimum fare of 100 is provided by Sprit airlines. Shall I proceed with this?

USER: Make sure my connections limit is 1.

ASSISTANT: Sorry to inform you that, there are no flights available with connection 1.

USER: Anyway, thank you for the information.

ASSISTANT: Thank you for approaching us, have a great day.