You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Gary Taylor.

ASSISTANT: How can I assist you?

USER: I am looking to book a flight ticket from PHL to IAH. Can you help me for that?

ASSISTANT: Sure, can I know the travel dates please?

USER: My travelling dates are Sep 19 and Sep 21.

ASSISTANT: Do you have any requirements?

USER: I need a single connecting flight.

ASSISTANT: There is a connecting flight in Delta airline, can I book it?

USER: Ok, proceed for booking.

ASSISTANT: Your ticket has been booked with flight number 1003.

USER: Thank you for booking.

ASSISTANT: Thank you for approaching us.

USER: Welcome.