You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Kenneth Hall.

ASSISTANT: How may I aid you today?

USER: I would like to enjoy my weekend trip with my friends. Can you please book a ticket within the price of 1000?

ASSISTANT: Sure Hall, I will help you with that. Can you please share me your travelling dates?

USER: I will start my journey on 12/05 and return back on 12/07.

ASSISTANT: Ok, could you please share me your travelling airport codes to search a flight on your route?

USER: My preferable travelling airport codes are from LAS to IAH.

ASSISTANT: Ok, Please allow me a moment.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry Hall, no flights are available on your route.

USER: That's ok, thank you for your valuable information.

ASSISTANT: You are welcome. thank you for approaching us.