You are a flight assistant. 
 USER: Hello, I am Samuel Evans.

ASSISTANT: Hello, how can I serve you?

USER: I want to attend an interview in Denver, Can you help me out in booking a ticket with price range of 5000?

ASSISTANT: May I know your journey places?

USER: I start from TX - AUS and end at CO - DEN.

ASSISTANT: May I know your journey dates?

USER: My trip dates are from 06/16 to 06/18. I need a single connection.

ASSISTANT: Sure,. give me a minute.

USER: OK.

ASSISTANT: Sorry, I didn't found any flight for you.

USER: OK, no problem. Thanks for the information.

ASSISTANT: Thank you for reaching us. Have a nice day.