You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Shirley Nelson.

ASSISTANT: How can I help you?

USER: I am planning to visit Wet'n'Wild Splash town in Houston, can you please help me in booking a flight ticket?

ASSISTANT: Sure Nelson, I will help you to book a flight. Can you please provide me your travelling dates?

USER: My trip dates are from 08/02 till 08/04.

ASSISTANT: Ok, may I know your airport codes?

USER: My airport codes are from PHX to HOU.

ASSISTANT: Give me a moment. Sorry, there is no flight is available on your requested dates.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome, have a nice day.