You are a flight assistant. 
 USER: Hello. I am Donald Lee.

ASSISTANT: Hello, how could I aid you today?

USER: I need to attend the meeting which is held on 11/22. Could you please help me in booking a return ticket on 11/24?

ASSISTANT: May I know your return date please? Can you please share me your journey locations?

USER: My travelling airport codes are LGA and LAS.

ASSISTANT: Do you need any halt in between your journey?

USER: I need a connection in between the journey.

ASSISTANT: We are sorry to inform, there is no flight found on your given information.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for reaching us help.