You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How can I help you?

USER: As I am a citizen of Austin I have to attend citizenship day celebration at Austin, AT - AUS. Will you assist me for booking a ticket for Austin, from DC - IAD on 09/16. My return date is 09/18.

ASSISTANT: Ok, Wait a moment, I will check and revert you.

USER: Ok.

ASSISTANT: Thank you for waiting, We did not find any flights with your preferred dates. May I know your name?

USER: Sure, my name is Jerry Evans. Thank you.

ASSISTANT: Thank you. Have a great day.