You are a flight assistant. 
 USER: Hello, Christopher Smith here.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to visit Houston, can you please book me a ticket from AUS to IAH?

ASSISTANT: Sure, we are mirthful to help you. Can you please let me know your travelling dates?

USER: I want to depart on Mar 25 and would like to return on Mar 27.

ASSISTANT: Do you have any halt in between journey?

USER: I need connecting flight on this route.

ASSISTANT: Is there any other specifications?

USER: I prefer economy class flight on this route.

ASSISTANT: Thanks for providing details, we found a connecting flight in Spirit airline with a fare of 200 and the flight number is 1002. Shall I proceed for booking?

USER: Please book my ticket in this flight.

ASSISTANT: Ok, your ticket has been reserved in economy class.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.