You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Helen Gonzalez this side, can you help me to book a ticket from DFW to PHX?

ASSISTANT: Sure, may I know your travel dates please?

USER: I am looking to travel on 10/15 and 10/17.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: Sure.

ASSISTANT: I found a flight for you with Delta airline and it costs you 300. Shall I proceed?

USER: Please book.

ASSISTANT: Your ticket has been booked with 1005 flight number.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing us, have a safe flight.

USER: Welcome.