You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Charles Carter. Can you help me to book a flight from DFW to PHL?

ASSISTANT: Sure, I am gleeful to help you. Could you please provide your travelling dates to search for the flight?

USER: I would like to travel on 05/18 and 05/20.

ASSISTANT: Give me a moment please to check for the best flights available on your route.

USER: Sure, please check.

ASSISTANT: Ok, there is a flight 1007 in Spirit airline matching your details with price 200. Shall I proceed?

USER: Proceed with my booking.

ASSISTANT: Ok, your booking is done.

USER: Thank you for your help.

ASSISTANT: You are welcome, have a safe journey.