You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you for today?

USER: Can you help me to book a flight ticket from AUS to IAD?

ASSISTANT: I am here to help you about that, can you please provide your planned dates of journey?

USER: My travelling dates are 05 and 07 of Feb.

ASSISTANT: Do you have any limits on number of connections for this trip?

USER:  I am willing to travel in a single connecting flight.

ASSISTANT: Can you please let me know your name for booking purpose?

USER: I am Paul Johnson.

ASSISTANT: Sorry Paul Johnson, there are no flights which travels to your region on your planned dates of journey.

USER: It's ok, not a problem, thank you.

ASSISTANT: You are welcome, thank you for reaching us. Hope you have a nice day ahead.