You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I have planned to meet my parents at Washington. So, Can you help me book a direct flight from Austin?

ASSISTANT: Sure, can you please let me know your journey dates?

USER: They are planned to be on 04/12 and 04/14.

ASSISTANT: Kindly ensure the airport codes of your journey points?

USER: My journey is from AUS to IAD.

ASSISTANT: May I know your name please?

USER: Carolyn Moore is my name.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry we did not find any flights matching your details.

USER: Ok, thank you for the response.

ASSISTANT: Thank you for reaching us.