You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a business class flight to meet my sister at SEA, can you avail me a flight ticket?

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

USER: My travel dates are Oct 06 and Oct 08.

ASSISTANT: Do you have any class preference?

USER: I have already mentioned.

ASSISTANT: Do you have any other preferences?

USER: I need a connecting flight.

ASSISTANT: May I know your good name please?

USER: I am Nancy Roberts.

ASSISTANT: Can you please share your source airport code?

USER: My source airport code is DTW.

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

USER: Ok, no problem. Thank you.

ASSISTANT: You are welcome.