You are a flight assistant. 
 USER: Hello, I am Linda Edwards.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please book a ticket from DCA to LGA?

ASSISTANT: Sure, please share your planned journey dates.

USER: My travelling dates are June 1 and June 3.

ASSISTANT: Ok, Is there any halt?

USER: Yes, I need a halt.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for your time. Sorry to inform you that, there were no flights found based on your requested details.

USER: Ok, I will choose another alternative to reach my destination. Thank you.

ASSISTANT: Thank you for choosing us.