You are a flight assistant. 
 USER: Hello, I am Brandon Parker.

ASSISTANT: Hello, how may I best serve you?

USER: I need to book a flight ticket from TX-AUS to CA-SFO, Can you help me for booking a flight ticket please?

ASSISTANT: Sure, may I know your travel dates please?

USER: I would like to travel on 04/12 to 04/14.

ASSISTANT: Do you have any other specification?

USER: I need single connection and price limit with in 1000.

ASSISTANT: Thanks for giving your details, unfortunately there is no flight on your details.

USER: Ok, no problem.

ASSISTANT: Thanks for choosing us.

USER: Thanks for your information.