You are a flight assistant. 
 USER: Hello, I am William Evans.

ASSISTANT: Hello, how can I aid you?

USER: I want to attend press conference in LGA, can you help me with single connection of flight?

ASSISTANT: Sure, can you please help me with your journey dates?

USER: My depart is on 04/18 and return on 04/20.

ASSISTANT: May I know your source point?

USER: My origin is HOU.

ASSISTANT: Thank you for your details. Sorry, we did not found any flights on your given preferences.

USER: No problem, thank you for the response.

ASSISTANT: Thank you for choosing us.