You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you at this moment?

USER: I am Charles Lopez, can you help me with booking ticket from DEN to SFO?

ASSISTANT: Sure, I will help you with this. Can you please provide your preferable journey dates?

USER: Ok, my trip starts at June 01 and returning on June 03.

ASSISTANT: Do you need any halt in this journey?

USER: I am looking for a single connection.

ASSISTANT: Do you have any other specification for this trip?

USER: No.

ASSISTANT: Southwest airlines is providing direct flight service on this route with a ticket fare of 200, shall I book your ticket?

USER: Please confirm it.

ASSISTANT: Charles Lopez, your ticket is booked in flight number 1028.

USER: Thanks for your help.

ASSISTANT: You are welcome and have a safe journey.