You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Donna Turner.

ASSISTANT: How can I aid you today?

USER: I have a business meeting in Los Angeles. Can you help me for booking a flight ticket from DCA to LAX?

ASSISTANT: Please share your travelling dates.

USER: My travelling dates are Dec 04 and Dec 06.

ASSISTANT: Do you need any connection limit?

USER: I need a single connecting flight.

ASSISTANT: May I know your depart and arrival timings?

USER: My departure time is morning.

ASSISTANT: Do you need any other specifications?

USER: No.

ASSISTANT: Sorry to inform you, there are no flights found in our database with your name.

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

ASSISTANT: Thank you for choosing us.

USER: Welcome.