You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you? May I know your travel dates?

USER: I need you to book a flight ticket from LGA to HOU. Please help me.

ASSISTANT: Do you have any preferences?

USER: I just need a break in between my journey.

ASSISTANT: May I know your travel dates please?

USER: June 17 and 19 are my planned travelling dates.

ASSISTANT: May I know your name please?

USER: My name is Paul Scott.

ASSISTANT: No flights found as per your preferences.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us.