You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Sharon Lee. I would like to travel from DEN to HOU, could you help me out?

ASSISTANT: Sure, can I know your travelling dates?

USER: My preferable dates are from 09/29 to 10/01.

ASSISTANT: We found a flight from Spirit airline with 1 connection and the fare is 700 with an business class.Shall I proceed?

USER: No, don't proceed.

ASSISTANT: Please hold on a moment. I will check and get back to you.

USER: Ok.

ASSISTANT: Sorry, there are no flight available for given dates. Thank you for reaching us.

USER: Thank you.