You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am planning to visit New York, can you please book me a ticket from DCA to LGA?

ASSISTANT: Sure, let me know your travelling dates.

USER: I am planning my journey on the dates of June 05 and June 07.

ASSISTANT: May I know your connection limit?

USER: I don't have any connection preference for this trip.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: May I know your name please?

USER: My name is Melissa Lee.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for opting us.