You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Can you please help me in flight ticket booking process from DEN to IAH?

ASSISTANT: Sure, may I know the planned travel dates to check for the flight availability?

USER: Thank you for your response, I want to take off on Mar 23 and book my return ticket also on Mar 25.

ASSISTANT: May I know the connection limit for this journey?

USER: I will prefer 1 break in between my journey.

ASSISTANT: Do you prefer for an economy class or a business class for this journey?

USER: No.

ASSISTANT: Do you have any airline preferences?

USER: No.

ASSISTANT: Please provide me the name to reserve the ticket.

USER: Sure, my name is Jason Young.

ASSISTANT: Sorry, there are no flights are available for your desired intent.

USER: It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.