You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you help me in booking my flight ticket from DCA to LAX?

ASSISTANT: Sure, please help me with your travel dates.

USER: My trip dates will be May 30th to June 1st.

ASSISTANT: May I know your name?

USER: I am Jessica Parker.

ASSISTANT: Do you have any class preference?

USER: I prefer a business class.

ASSISTANT: Do you prefer for a direct flight or connecting flight ?

USER: I prefer a connecting flight.

ASSISTANT: Do you have any airline preference?

USER: I am fine with any airline.

ASSISTANT: Thank you for the information, let me check the availability of the flights.

USER: Sure.

ASSISTANT: Sorry, I did not find any flights for you.

USER: Its ok, thank you.

ASSISTANT: Thank you for reaching us.