You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you at this moment?

USER: I am David Clark. I want to book a flight ticket from LGA to SEA. Can you please help me for booking?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are Dec 28 and 30.

ASSISTANT: Ok, share your connection limit.

USER: I need a stopover.

ASSISTANT: Ok, do you have any other requirements?

USER: My return time is evening.

ASSISTANT: Ok, please wait for few minutes. There are no flights found on your requested dates.

USER: Sure. That's Ok, thanks for your help.

ASSISTANT: Thank you for reaching us.