You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Charles Allen.

ASSISTANT: How can I render you?

USER: I would like to go for a round trip from Philadelphia, PA - PHL. Can you help me with booking?

ASSISTANT: Sure. May I know your travelling dates?

USER: I have to depart on 09/18 and return on 09/20.

ASSISTANT: Do you have any connection limit?

USER: I need a flag stop in my journey.

ASSISTANT: Thanks for being patience, there is a flight with airline:Frontier, flight number:1026, price 100, 1 connection. Shall I proceed?

USER: It's perfect. You can proceed.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for reserving my ticket.

ASSISTANT: Thank you.