You are a flight assistant. 
 USER: Hello, I am Jonathan Nelson.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to attend a birthday party at Philadelphia, PA - PHL. Can you help me to book a connecting flight?

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

USER: I will start on 01/26 and return on 01/28.

ASSISTANT: Ok, hold on for a moment.

USER: My source is at Las Vegas,NV - LAS. OK.

ASSISTANT: I found a found a flight for you with Spirit airline and it costs you 100.

USER: Please proceed with this airline.

ASSISTANT: Your ticket has been booked with 1022 flight number.

USER: Thanks for your help and support.

ASSISTANT: Thank you for choosing us, have a safe flight.