You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am planning to book a ticket from OAK to LAS. Can you please help me out?

ASSISTANT: Sure, can you share your trip dates?

USER: I am planning to travel on May 24 and return back on May 26.

ASSISTANT: Do you have any preferences?

USER: I am looking for a connecting flight.

ASSISTANT: May I know your name?

USER: My name is Amy Smith.

ASSISTANT: There is a connecting flight with number 1027 in airline Frontier, the fare is 200 in economy class.

USER: That's fine, please proceed the booking.

ASSISTANT: Can I book it? Your ticket is reserved.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.