You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Amanda Perez.

ASSISTANT: How can I help you?

USER: I am planning to book a ticket from DCA to EWR. Can you please help me out?

ASSISTANT: Yes, could you tell me your travelling dates?

USER: These are my travelling dates 12/06 and return back on 12/08.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: That's fine.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your service.