You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I aid you?

USER: My name is Patricia Lopez, I want to book a ticket from NY - EWR to CO - DEN.

ASSISTANT: OK, please provide me your journey dates?

USER: My return day is on Mar 14th and my depart day is on Mar 12th. Make sure that, my price should be within 1000 only, and with one connection.

ASSISTANT: OK, please wait I will let you know.

USER: OK.

ASSISTANT: Thank you for waiting. Sorry, no flights are available on your requested dates.

USER: OK, no problem.

ASSISTANT: Thank you for availing us, have a good day.

USER: Thank you.