You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you now?

USER: Can you help me in booking a flight ticket from DFW to DEN?

ASSISTANT: Sure, may I know your travel dates please?

USER: I want to travel on 02/24, and return on 02/26.

ASSISTANT: Can I know your limit on maximum number of connections?

USER: I need a single connection.

ASSISTANT: May I know your class preference for your journey?

USER: I prefer for economy class.

ASSISTANT: Do you have any more specifications?

USER: No.

ASSISTANT: Let me know your name to proceed further for documentation purpose.

USER: I am Andrew Williams.

ASSISTANT: Sorry for the inconvenience, there are no flights available as per your specifications.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for reaching us.