You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, Could you please tell me how may I guide you?

USER: I would like to book a flight ticket from LAX to attend a robotic workshop at DCA, can you help me to book a flight ticket?

ASSISTANT: Sure, we are rapturous to help you.

USER: Thank you.

ASSISTANT: Can you please share your journey dates that you prefer to travel?

USER: Yes, my travelling dates are 15 and 17 of Sept.

ASSISTANT: Do you require any stopovers in your journey?

USER: Yes, I need a connecting flight.

ASSISTANT: May I know your name?

USER: My name is Lisa Harris.

ASSISTANT: Is there any other specifications?

USER: I want to depart in the evening.

ASSISTANT: Ok, please wait a minute I will get back to you with the flight details.

USER: Sure, take your time.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: That's ok, thank you for the information.

ASSISTANT: Thanks for reaching us.