You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Emily Harris here.

ASSISTANT: How may I aid you today?

USER: I would like to visit Philadelphia to meet my grand parents over there, can you please help me to book a flight ticket to go there?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Can you please mention your travel dates for booking flight ticket?

USER: Sure, I am planning to go on 04/28 and please book a return ticket on 04/30.

ASSISTANT: May I know your preferable airport code names?

USER: Sure, I want to travel from DEN to PHL.

ASSISTANT: Ok, just give me a moment, I will check is there any flight available or not.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting. There is a flight available as per your requested dates, airline is Delta and flight number is 1017. Shall I confirm this flight ticket for you?

USER: If it is single connected flight, you can proceed with booking.

ASSISTANT: Yes, connection limit this airline is 1. Your flight ticket has been booked successfully.

USER: Thank you for your assistance.

ASSISTANT: Thank you for reaching us, have a good day.