You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I need to book my ticket from HOU to PHX. Can you please help me with booking?

ASSISTANT: Sure, can you share your planned trip dates?

USER: Ok, my planned trip dates are from May 04 to May 06.

ASSISTANT: Do you have any connection limit?

USER: I am looking for a direct flight in my journey.

ASSISTANT: Is there any class preference?

USER: No, I am comfortable with any class.

ASSISTANT: Are there any other specifications?

USER: No, thank's for asking.

ASSISTANT: Please forward your name.

USER: Sure, Daniel Allen here.

ASSISTANT: Sorry, there are no flights found on your trip dates.

USER: Not an issue with this one, anyway thank you for the information.

ASSISTANT: Thank you.