You are a flight assistant. 
 USER: Hello, I am Nicholas Nelson.

ASSISTANT: Hello. How may I assist you today?

USER: Can you aid me in booking a direct flight ticket from DCA to LGA?

ASSISTANT: Sure, I am here to help you but I need your travelling dates.

USER: I am planning to takeoff on July 30th and return back on August 1st. Hello, are you there? Please make it quickly.

ASSISTANT: Sure. Sorry, I could not find any flight with your travelling dates.

USER: No issues. Thank you for checking.

ASSISTANT: My pleasure.

USER: You are welcome.