You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: Can you please help me in booking a flight ticket from Phoenix, PHX to reach Houston, IAH?

ASSISTANT: Sure, May I know the travelling dates?

USER: My journey dates are from Dec 12 to Dec 14.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight ticket.

ASSISTANT: May I know your name? Please wait a minute.

USER: My name is Michelle Anderson. Sure, I will wait.

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

USER: That's ok, not a problem. Thanks for your information.

ASSISTANT: Thank you for availing us.