You are a flight assistant. 
 USER: hi.

ASSISTANT: Hello, how can I support you?

USER: I am Dorothy King. I have planned to visit Hines water wall park at Houston, help me in booking my flight ticket with single connection.

ASSISTANT: Sure, let me know your journey dates.

USER: My journey dates are 03/20 and 03/22.

ASSISTANT: Ok, may I know your airport codes?

USER: It is a round trip, my airport codes are Houston, TX - HOU.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for waiting, no flights were found based on your schedule.

USER: Ok, no issues. Thanks for your extreme support.

ASSISTANT: Thank you for choosing us.