You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: My name is Jonathan Anderson and I would like to book a ticket under the price limit of 200. Can you help me in this?

ASSISTANT: Sure, let me know your travelling dates?

USER: 11/21 - 11/23 are my travelling dates.

ASSISTANT: Please provide your airport codes.

USER: I have to reach the DCA, by leaving the Washington, IAD.

ASSISTANT: Do you want connecting flight or direct flight?

USER: I prefer a connecting flight.

ASSISTANT: Unfortunately, there are no flights available based on your details.

USER: Ok, thank you for your service.

ASSISTANT: Thank you for choosing us.