You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am looking for a flight from LGA to DCA, can you please help me in booking?

ASSISTANT: Can I have your good name please?

USER: Sure, my name is Cynthia Martin.

ASSISTANT: Please provide your planned journey dates.

USER: My travelling dates are Oct 19 and Oct 21.

ASSISTANT: Do you have any connection preference?

USER: I prefer direct flight.

ASSISTANT: May I know your class preference?

USER: I am fine with any class.

ASSISTANT: Do you have any other specifications?

USER: I want to depart in evening.

ASSISTANT: Please hold on a moment.

USER: Sure.

ASSISTANT: Cynthia Martin, no flights has been found on your planned travel dates.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.