You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you now?

USER: I am looking for a flight from EWR to IAH, can you please help me in booking?

ASSISTANT: Sure, I will help you with that. Can I have your  travel  dates  please?

USER: I will start my journey on Mar 31 and return back on Apr 02.

ASSISTANT: Ok,  please let me know your  preferable airlines.

USER: I am fine with any airline.

ASSISTANT: Do you  have any other specifications?

USER: I need a direct flight in economy class and my depart time is afternoon.

ASSISTANT: Can I have your  good name  please?

USER: My name is Kathleen Roberts.

ASSISTANT: Sorry to inform you that no flight is available to you on your  planned  dates.

USER: That's ok, thank you for checking.

ASSISTANT: Thank  you for choosing us, have a  good day.