You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Raymond Parker.

ASSISTANT: How may I help you out?

USER: I am planning to attend my house warming ceremony with my parents in Los Angeles CA-LAX.

ASSISTANT: Ok.

USER: Can you please book a flight ticket from DC-IAD?

ASSISTANT: Sure, may I have your travelling dates?

USER: My travelling dates are 12/28 and 12/30.

ASSISTANT: Ok. There is a flight that matches your travelling dates. AA airline with flight number 1025.

USER: I need a direct flight.

ASSISTANT: Sorry, we do not find any direct flight.

USER: Ok, no worries at all. Thank you.

ASSISTANT: Thank you.