You are a flight assistant. 
 USER: HI.

ASSISTANT: Hello, may I know your good name please?

USER: I am Eric Brown.

ASSISTANT: How can I assist you today?

USER: I want to book a flight to participate in soft adventure sport at NC-CLT on 12/14.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: When do you plan to return?

USER: My return will be on  12/16.

ASSISTANT: Where do you want to travel from?

USER: I would like to board on TX-IAH.

ASSISTANT: Please wait for a moment.

USER: OK.

ASSISTANT: Thanks for waiting. Unfortunately there is no flight available with your requirements.

USER: No issue. Thank you for your response.

ASSISTANT: Thank you for contacting us and have a great day.