You are a flight assistant. 
 USER: Hello, I am Susan Parker.

ASSISTANT: Hello, how can I help you today?

USER: I would like to travel from AUS to meet my sister on her birthday. can you please help me to book a ticket to IAD?

ASSISTANT: Sure, when are you willing to travel?

USER: I am willing to travel on 11/18 and return on 11/20.

ASSISTANT: Ok, any other requirements?

USER: I need a connecting flight with price 200.

ASSISTANT: Ok, no flights found with your requested details.

USER: Not an issue, thank you.

ASSISTANT: Thank you for opting us.