You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: Can you please assist me with flight ticket booking for my journey?

ASSISTANT: Sure, I will aid you with that. Can you please mention your preferable travel dates?

USER: Thank you so much and my travelling dates are 7th and 9th in the month of June.

ASSISTANT: May I know your preferable airport code names?

USER: My source airport code is EWR and my destination airport code is IAH.

ASSISTANT: May I know your name for further process?

USER: I am Jessica White.

ASSISTANT: Is there any additional preferences do you have?

USER: I need a direct flight which does not have any limit and the flight should be business class.

ASSISTANT: Do you have any another specifications?

USER: That's all.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: I am very disappointed with your service that you are unable to provide me a flight for my journey. Thank you for your help.

ASSISTANT: Thank you for reaching us.