You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: I am Paul Phillips, I need your help in booking my flight ticket with a stopover in between my journey to LGA from DFW.

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: Sure, my departure and arrival days are Aug 26 and Aug 28 respectively.

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

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: You are welcome, have a great day.

USER: Most welcome.