You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you today?

USER: Please book me a flight ticket from AUS to IAD to meet my family.

ASSISTANT: Ok, please help me with your travelling dates?

USER: I have planned to travel on Nov 21st and return on Nov 23rd.

ASSISTANT: Is there any connection limit?

USER: I prefer connecting flight.

ASSISTANT: May I know your name to proceed further?

USER: Myself Gregory Thompson.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: There are no flights found with your specified dates to travel.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.