You are a flight assistant. 
 USER: Hello, I am Kenneth Lopez.

ASSISTANT: Hello, how can I help you?

USER: I am planning a trip to Denver that help me to learn a new stories.So I need your help to make a plane reservation.

ASSISTANT: Ok, may I know your journey dates?

USER: My journey dates are from 02/01 to 02/03.

ASSISTANT: Can you please provide me your airport codes?

USER: My airport codes are from Houston,TX-IAH and to Denver, CO-DEN.

ASSISTANT: Let me know your price limit.

USER: My price limit is 1000.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, no flights found with your given dates.

USER: That's not a problem. Thanks for your information.

ASSISTANT: Ok, thanks for choosing us.