You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi,.

USER: Kevin Hernandez here.

ASSISTANT: How may I help you?

USER: I am planning to travel from DC - DCA to enjoy fun-filled holidays with my family. Could you please help me to book a ticket?

ASSISTANT: Sure. Please mention your travelling dates?

USER: My planned trip dates will be on 11/24 to 11/26.

ASSISTANT: Could you please provide your destination airport code?

USER: My destination airport code is PA - PHL.

ASSISTANT: No flights found for your travelling dates.

USER: Not an issue, thank you.

ASSISTANT: Thank you.