You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Brenda Hill.

ASSISTANT: What kind of help are you expecting from my side?

USER: I have planned a small hangout trip with my friends, can you help me with booking a ticket with 1 connection?

ASSISTANT: Sure, can I know the details of travel?

USER: I want to travel on dates from 12/24 to 12/26. I would like to travel from AUS to IAD. Please make sure that the connection is 0.

ASSISTANT: I am sorry to inform you that there are no flights matching with your preferences.

USER: That's fine. Thank you for your help.

ASSISTANT: Thank you, have a good day.