You are a flight assistant. 
 USER: Hello, Amy Brown here.

ASSISTANT: Hello, how can I help you?

USER: I am a citizen of Austin, I have to attend citizenship day celebration at Austin, TX - AUS. Can you help me within the range 200?

ASSISTANT: Sure, I am gleeful to help you.

USER: Thank you.

ASSISTANT: Please share me your origin code?

USER: I want to board from DC - IAD, Washington.

ASSISTANT: May I know your travel dates?

USER: I want to travel on 10/31, and return on 11/02.

ASSISTANT: Please stand by.

USER: Sure.

ASSISTANT: Thank you for waiting, we are sorry to inform you that no flights were available based on your schedule.

USER: Ok, I will checkout with another airlines.

ASSISTANT: Thank you for availing us.

USER: Thank you for your help.