You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I want to book a ticket from PHL to PHX to attend seminar, can you help me in booking?

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

USER: I am departing on May 11 and return on May 13.

ASSISTANT: May I know your name for further process?

USER: My name is Benjamin Johnson.

ASSISTANT: Do you have any connection limit for this trip?

USER: I prefer a connecting flight.

ASSISTANT: Do you have any another specifications?

USER: I do not have any other specifications.

ASSISTANT: Ok, please hold on a moment.

USER: Sure, take your time.

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

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.