You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am David Wright, can you help me to book a flight ticket from AUS to DFW?

ASSISTANT: Sure, I am blissful to help you out. Please share me your arrival date and return date.

USER: Yes, my travel dates are 09/18 and 09/20 respectively.

ASSISTANT: Ok, please wait a moment.

USER: Sure, will wait no problem. Please book a connection flight with limit 1.

ASSISTANT: Sorry. there is no connecting flight with 1 connection.

USER: That's ok, not a problem.  Thank you for assisting me.

ASSISTANT: Thank you for reaching us.