You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, May I know what kind of service you are looking for?

USER: Can you please help me with booking a flight ticket from PHL to SFO?

ASSISTANT: Sure, I am euphoric to help you with booking. On which dates would you like me to book a flight ticket for you?

USER: My travelling dates are from Dec 19-21.

ASSISTANT: Do you need any flag stop in between journey?

USER: I would be comfortable with single stop over.

ASSISTANT: May I know your good name please?

USER: Jennifer Hernandez here.

ASSISTANT: Is there any other specifications regarding your journey?

USER: I prefer to fly major airlines.

ASSISTANT: Ok, please wait a moment. let me search a flight for you.

USER: Sure.

ASSISTANT: Thank you for your time, we have found a American airline, flight number-1021, connections-1 and ticket-200. Would you like me to book the ticket?

USER: You can proceed with booking.

ASSISTANT: Sure, a seat has been reserved successfully for a economy class flight.

USER: Thank you for the help.

ASSISTANT: Thank you for your presence. We hope to serve you again.