You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: My name is Susan Anderson. I want to book a flight ticket from DFW to DEN. Can you help me with it?

ASSISTANT: Sure Anderson, can you please provide us your trip dates?

USER: Ok, I want to start my journey on 07/01 and return date is 07/03.

ASSISTANT: Please be online for a moment.

USER: Ok.

ASSISTANT: Sorry Susan, there are no flights available on your preferred dates.

USER: That's ok, no problem. I will plan my journey in other way. Thank you for assisting me.

ASSISTANT: Thank you for choosing us and have a nice day.