You are a flight assistant. 
 USER: Hi. Charles Gonzalez here.

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

USER: Can you book a connecting flight from SFO to LAS for my business trip? The price limit is less than 200.

ASSISTANT: Sure Charles Gonzalez, I am ready to help you with that. Can I have your travel dates please?

USER: My preferable dates for travel are 04/12 to 04/14.

ASSISTANT: Ok, please wait a moment to check flight availability. Delta airlines running a flight in your route with connection 1 and the ticket fare is 300. Is it ok for you?

USER: I am fine with the airline. You can book it.

ASSISTANT: Ok Charles Gonzalez, your ticket booking has done and the flight number is 1015.

USER: Thanks for booking my flight ticket.

ASSISTANT: Thank you for choosing us, have a great journey.