You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: I am planning for a vacation with my family to PHX, can you help me with booking ticket from IAH?

ASSISTANT: Sure, May I know the travelling dates?

USER: Ok, my planned dates are from Aug 02 to 04.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any other requirements?

USER: I would like to return in the afternoon time.

ASSISTANT: May I know your name?

USER: Ok, myself Samuel Lopez.

ASSISTANT: Please wait a minute.

USER: Sure, get back with the proper information.

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

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for opting us.