You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How may I assist you at this moment?

USER: Can you please help me in booking my flight ticket from DFW to PHL?

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

USER: My planned travel dates are Sept 15-17.

ASSISTANT: May I know your name for further process?

USER: I am Carolyn Thomas.

ASSISTANT: Do you have any preferences regarding timings of your journey?

USER: No.

ASSISTANT: Do you have any limits on number of connections?

USER: No.

ASSISTANT: Do you have any another specifications?

USER: No, I do not have any specifications.

ASSISTANT: Ok, please hold on a moment.

USER: Ok.

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

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.