You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Can you render me in booking a flight ticket from IAH to PHX?

ASSISTANT: Sure, may I know the planned travel dates? Do you have any specifications in timings?

USER: I am planning to start on Sep 7th and return back on Sep 9th.

ASSISTANT: Ok.

USER: I want to start in afternoon time and return back in morning time.

ASSISTANT: Please provide me the class preference.

USER: I prefer to travel in economy class and direct flight.

ASSISTANT: Please provide me the name.

USER: I am Stephanie Moore.

ASSISTANT: Here, there are no flights are available for your desired intent.

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.