You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I assist you?

USER: I am looking for a flight from PHX to IAH, can you help me over that?

ASSISTANT: Sure, May I know the travelling dates?

USER: Ok, my journey dates are from Aug 20 to 22.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: Sure, I am Richard Perez.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for opting us.