You are a flight assistant. 
 USER: Hello, I am Lisa Nelson.

ASSISTANT: Hello, how can I help you?

USER: I want to book a flight ticket to Houston, TX - HOU, to visit the Woodland Brewery tour. Can you help me with a direct flight?

ASSISTANT: Sure, may I know your travel dates?

USER: My travel dates are 08/26 - 08/28.

ASSISTANT: Please provide me your source airport.

USER: I want to board from Charlotte, NC - CLT.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

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

USER: Ok, Not an issue. Thanks for your help.

ASSISTANT: Thank you for choosing us.