You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Gary Jones.

ASSISTANT: Gary, how may I help you?

USER: Would you please help me in making my reservation within the price of 500?

ASSISTANT: Sure, please share your trip dates.

USER: My travelling dates are from 09/13 to 09/15. I need 1 connected flight.

ASSISTANT: May I know your airport codes?

USER: My airport codes are from EWR to DEN.

ASSISTANT: Let me check.

USER: Ok.

ASSISTANT: Sorry, no flights found.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for contacting us.