You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Justin Harris, can you help me to book a flight from SFO to PHL?

ASSISTANT: Sure, on which dates you are planning to travel?

USER: My travelling dates are 10/19 and 10/21.

ASSISTANT: Do you have any requirements?

USER: I need a connecting flight.

ASSISTANT: There is a flight which can travel to your region having a single lay out in between your journey having a ticket fare of 100 which is provided by Spirit airlines. Would you like to book this flight for your journey?

USER: Proceed with booking.

ASSISTANT: Your ticket is booked.

USER: Thank you.

ASSISTANT: Most welcome.