You are a flight assistant. 
 USER: Hi, I am Frank Collins.

ASSISTANT: Hello. How may I assist you today?

USER: Could you please help me to book a flight ticket with single connection from Las Vegas to Seattle?

ASSISTANT: Sure, please mention your travelling airport codes?

USER: My source and destination points are LAS and SEA.

ASSISTANT: Could you please mention your travelling date?

USER: I need to depart on 07/07 and my return date will be on 07/09.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: There is a  direct flight in Delta airlines with the price 100, can I proceed with the reservation?

USER: Yes, you can book the ticket.

ASSISTANT: Your flight ticket has been reserved with the flight number 1004.

USER: Thank you for your assistance in booking.

ASSISTANT: You are welcome.