You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I want to book a flight ticket, can you please help me?

ASSISTANT: Sure, may I know your name?

USER: Myself Michael Young.

ASSISTANT: Michael, can you provide your destination and journey details?

USER: I want to travel from Denver, CO-DEN to Houston, TX-HOU. Please check whether the flight is available in the dates from 06/24 to 06/26.

ASSISTANT: Sure, let me check Michael, give me a moment.

USER: Sure.

ASSISTANT: Sorry Michael, I didn't find any flights regarding your details.

USER: Its OK no issues and thank you for the information.