You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Christine Lopez. I would like to attend a training session for new project at my main branch at Denver.

ASSISTANT: Sure, can you please share your travel dates?

USER: Could you please help me in booking a ticket with fare of 500?

ASSISTANT: Yes, I can help you with that.

USER: My travelling dates are 02/25 and return on 02/27.

ASSISTANT: Could you please help me with the airport codes?

USER: My airport codes are PHX and DEN.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Christine Lopez, there is a flight available with price 100 and the connection is 1 with UA airline. Would you like me to proceed with the booking?

USER: You can proceed with booking.

ASSISTANT: Your booking is confirmed with 1010 flight number.

USER: Thank you.

ASSISTANT: Thank you for reaching us.