You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: Can you help me in booking on Jan 11 to Jan 13, as there is a musical concert to attend?

ASSISTANT: Sure, could you please share me your airport codes?

USER: My source is IAD and destination is AUS.

ASSISTANT: Do you have any airline preference?

USER: I prefer a normal-cost airline.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you need any other specifications?

USER: No.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: May I Know your good name please?

USER: I am Gregory Carter.

ASSISTANT: Sorry to inform you that there are no flight services available on your given dates.

USER: No issue, thank you.

ASSISTANT: Thanks for contacting us.