You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Can you help me in booking a flight ticket from IAH to PHL?

ASSISTANT: May I know your trip dates?

USER: I want to travel on 11/01, and return on 11/03.

ASSISTANT: Is there any specifications?

USER: I want to return in the afternoon time.

ASSISTANT: May I know your name?

USER: I am Nicholas Lee.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: There is a connecting flight-1012 in economy class, shall I proceed?

USER: Proceed with the booking.

ASSISTANT: Ok, booking is done on Delta airlines.

USER: Thanks for the help.

ASSISTANT: Welcome.