You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am Nicholas Evans. I would like book a flight ticket from IAD to AUS to meet my friends. Could you please help me with booking a connecting flight?

ASSISTANT: Sure, please provide me your planned travel dates.

USER: Sure, my planned travelling dates are 01/09 and 01/11.

ASSISTANT: Do you have connection limit?

USER: Yes, I need a connecting flight.

ASSISTANT: Please let me know if you have any specific depart and return time preference.

USER: I want to return in the evening.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, we didn't find any flight for your journey details.

USER: No worries, thank you for the information.

ASSISTANT: Thank you.