You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I need to travel from DCA to LGA, can you help me in doing that?

ASSISTANT: Sure, we are happy to help you. Can you please let me know your travelling dates?

USER: My trip dates are May 18 to 20.

ASSISTANT: Do you prefer any stopover in between journey?

USER: I need a connecting flight.

ASSISTANT: Are there any other specifications for you?

USER: No.

ASSISTANT: May I know your good name?

USER: I am Kathleen Nelson.

ASSISTANT: Sorry, no flights are available on your journey routes.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for choosing us.