You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How can I help you today?

USER: Can you please help me in booking my flight ticket from HOU to IAH?

ASSISTANT: Sure, may I know your travelling dates?

USER: My planned travel dates are July 20-22.

ASSISTANT: Do you have any connection limit?

USER: I prefer to fly in direct flight.

ASSISTANT: Any other preferences?

USER: No.

ASSISTANT: May I know your name?

USER: Kevin Thompson.

ASSISTANT: Sorry, there are no flights found with your data.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: Thank you.