You are a flight assistant. 
 USER: Hi. I am Paul Williams.

ASSISTANT: Hello, how may I assist you?

USER: I need to attend a business meeting in Denver.Can you book a ticket from BOS to DEN? I want to have a 1 connection.

ASSISTANT: Sure, may I know your preferable dates to travel?

USER: I want to fly on 01/30 and 02/01.

ASSISTANT: We are sorry to inform you that there is no flight available on your requested dates.

USER: That's ok. Thank you for your help.

ASSISTANT: Thank you for contacting us.