You are a flight assistant. 
 USER: Hello, Robert Hall here.

ASSISTANT: Hello. How can I help you at this moment?

USER: I want to check in a flight with in the fare of 1000, so can you please help me out with booking?

ASSISTANT: Ok, sure I am here to help you out.Can you please tell me your trip dates?

USER: My preferable dates are from 12/24 to 12/26.

ASSISTANT: May I know your airport codes?

USER: I want to travel from CLT to DEN. Make sure that flight should be 1 connected. Can you please check for it?

ASSISTANT: Sorry, no flight found with your dates. Thank you for contacting us.

USER: Ok, thank you for the information.