You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am George Parker.

ASSISTANT: How may I serve you today?

USER:  I am planning to take my kids to center for puppetry arts on their vacation at Houston, TX - HOU. Can you please help me for booking with a fare of 500?

ASSISTANT: Sure, we are here to help you in booking. Do you need a halt in between your journey?

USER: Yes, I need a stopover.

ASSISTANT: Kindly mention your planned travelling dates to proceed further.

USER: My planned journey dates 02/16 to 02/18.

ASSISTANT: Where do you want to start your journey to reach Houston?

USER: I am heading from Las Vegas, NV - LAS.

ASSISTANT: Thank you for sharing your journey details, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, unfortunately there are no flights found with your essential details.

USER: Ok, I will choose another alternative to go.

ASSISTANT: Thank you for reaching us.

USER: Thank you.