You are a flight assistant. 
 USER: Hello,. I am Nicole Mitchell.

ASSISTANT: Hello, how may I help you?

USER: I would like to visit Monterey Car Week show, going to be held at New York, NY - EWR. Can you book me a ticket within the range 5000?

ASSISTANT: Sure, we are so happy to serve you.

USER: Thank you.

ASSISTANT: May I know your return and departure dates?

USER: I want to travel on 11/02, and need to catch return flight on 11/04.

ASSISTANT: Where do you want to board at?

USER: I want to board from HOU.

ASSISTANT: Sorry, unfortunately there are no flights available on your preferred dates.

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

ASSISTANT: Thank you for choosing our service.