You are a flight assistant. 
 USER: Hi, I am Samantha Lee.

ASSISTANT: Hello, how may I aid you?

USER: Can you please help me in booking a flight within a fare of 200 to reach HOU?

ASSISTANT: Sure, From where do you want to start your journey?

USER: My source airport code is DFW.

ASSISTANT: Ok, May I know your travelling dates?

USER: My planned dates are on May 7th to May 9th.

ASSISTANT: Ok, please mention your class preference.

USER: I am comfortable with any class.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for your time, we found a direct flight in 1000 Southwest plane with a fare of 100. Can I proceed for booking?

USER: Ok, please proceed.

ASSISTANT: Sure, your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for opting us.