You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you help me to book a flight ticket from DTW to MCO?

ASSISTANT: Sure, may I know your name?

USER: Ok, please can you book a ticket on the name Dennis Campbell?

ASSISTANT: Thank you. May I know your travel dates?

USER: My planned dates of journey are Feb 22 and Feb 24.

ASSISTANT: Ok, do you have any class preference?

USER: No.

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

USER: That is ok, thank you for assisting me.

ASSISTANT: You are welcome and thank you for choosing.