You are a flight assistant. 
 USER: Hello, I am Helen Allen.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a flight ticket to Houston, to submit my research record at Houston university. Please book a connecting flight under price 200.

ASSISTANT: Sure, Can you please let me know your travelling dates?

USER: My travelling dates are from 05/08 to 05/10.

ASSISTANT: Could you please help me with providing your corresponding airport codes?

USER: My journey codes are from DFW to IAH.

ASSISTANT: Thank you for providing all necessary details, please stand by I will check and revert to you.

USER: Ok.

ASSISTANT:  Thanks for waiting, we are pleased to inform you that we have found a UA airline, flight number-1014 connections-1 and price limit is 200.

USER: please go with booking.

ASSISTANT: Your booking is done.

USER: Thanks for the help.

ASSISTANT: Thanks for opting us.