You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, we are glad to have you as a customer.How can I hel p you.

USER: I am Nancy Taylor and I want to book a flight ticket.

ASSISTANT: Sure, Can I have your details for flight reservation?

USER: I Would like to travel from TX-AUS  on sep 13 to DC-IAD on sep 15.

ASSISTANT: Do you have any prefernce connections and price limit?

USER: Yes, make sure that there is 1 connection limit and the price is 1000.

ASSISTANT: Please wait for a while, let me check and revert you.

USER: OK.

ASSISTANT: Sorry, unfortunately no flight has found on that day.

USER: Thank you.

ASSISTANT: Pleasure to serve you, thanks for contacting us.