You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Robert Scott here.

ASSISTANT: Scott, how can I assist you?

USER: I want to meet my aunt, please book my ticket from DEN to MSP.

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

USER: My itinerary dates are 04/09 and 04/11.

ASSISTANT: Ok, please be online for sometime.

USER: I will be online.

ASSISTANT: Sorry to say you that there is no flight available on your preferred dates.

USER: No problem, thank you.

ASSISTANT: You are welcome and thank you for contacting us.