You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Myself David Davis. Can you please book a flight ticket from MSP to DTW?

ASSISTANT: Sure, please provide me your travel dates.

USER: I want to take off on 05/05 and please book my return ticket also on 05/07.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Sorry David, there is no flight available on your preferred travel dates.

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

ASSISTANT: You are most welcome and thank you for choosing us.