You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me in reserving the ticket from PHL to LAS?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: I would like to travel on Aug 7 and again I will return back on Aug 9.

ASSISTANT: Do you have any other specifications?

USER: I want to travel in single connection flight.

ASSISTANT: Please help me with your name for booking.

USER: Myself Donald Smith.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 1017 with flight number 100. Shall I proceed with this flight?

USER: I want to depart in the evening. Can you please check for this?

ASSISTANT: Your booking is done.

USER: Thank you very much for reserving the ticket.

ASSISTANT: Most welcome.