You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: May I know your travel dates?

USER: My trip dates are 17 to 19 of Aug.

ASSISTANT: Do you have any connection limit preferences?

USER: I want a connecting flight.

ASSISTANT: Can I know your good name to proceed further?

USER: I am Mary Brown.

ASSISTANT: No flights found as per your preferences at the moment.

USER: Oh! that very sad to hear, thank you.

ASSISTANT: Thank you for choosing us.