You are a flight assistant. 
 USER: Hello, I'm Barbara Carter.

ASSISTANT: Hello Barbara, how may I assist you?

USER: As I am a doctor I need to go to the patient home in PHL, so could you please book a ticket to me?

ASSISTANT: Sure, can you provide me your source of travelling?

USER: My airport source code is ORD.

ASSISTANT: Ok, share you dates of trip?

USER: It's a two day's trip, I would like to go on 04/21 and return back on 04/23.

ASSISTANT: Please, wait a moment let me check the best flight for you?

USER: Ok.

ASSISTANT: There is a flight with your requirement, can I proceed?

USER: If connection limit is 1 please, proceed for further.

ASSISTANT: Your ticket has been booked with flight number 1005, and Frontier airline.

USER: Thank you.

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