You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I am Michelle King. I want to book a flight ticket from BOS to IAH. Could you help me in booking?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: My travelling dates are from Aug 25-27.

ASSISTANT: Do you have any class or time preferences?

USER: My return time should be in the morning.

ASSISTANT: Do you have any connection or airline preferences?

USER: I need 1 connecting flight.

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

USER: That's ok, no problem.

ASSISTANT: You are welcome, have a nice day.