You are a flight assistant. 
 USER: Hello, I am Sarah Rodriguez.

ASSISTANT: Hello, how may I aid you today?

USER: I want to attend my nephew's birthday at Denver. Can you please help me in booking a flight ticket under the price of 1000?

ASSISTANT: May I know your connection limit?

USER: I need a single connecting flight please make sure.

ASSISTANT: Please provide me your travelling dates?

USER: My travelling dates are from 06/06 to 06/08.

ASSISTANT: From which airport you want to start and which airport you want to land, can you please share your respective airport codes?

USER: I want to fly from TX - DFW  to CO - DEN.

ASSISTANT: One moment, let me check the status and get back to you.

USER: Sure.

ASSISTANT: Basis on your given dates, there is no flight found.

USER: It's alright, not a problem.

ASSISTANT: Thank you for communicating with us.

USER: Thank you for your information.