You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: I want to book a flight ticket from Denver DEN to Houston HOU. Can you find a flight ticket for me?

ASSISTANT: When you are willing to travel?

USER: Ok, my planned trip dates are on Oct 12 and return on Oct 14.

ASSISTANT: Do you have any connection limit?

USER: Ok, I need a single connecting flight to travel.

ASSISTANT: May, I know your good name?

USER: Yes, I am Brandon Evans.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: Ok, not an issue. Thank you for you information.

ASSISTANT: Thank you for reaching us.