You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I am Kenneth Lee. I need your help in booking my flight ticket from IAD to AUS, can you please help me?

ASSISTANT: Sure, I am here to help you in booking process. Can you please share your travel dates?

USER: Sure, I will depart on 11/12 and also please book my return ticket on 11/14.

ASSISTANT: Do you want any halt in between your journey?

USER: Yes, I need single connection flight.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: Sad to hear that. Anyway, thank you for checking.

ASSISTANT: Thank you for reaching us, have a nice day.