You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. Can I know which help you are looking for?

USER: This is Charles Martin, can you help me out to book a flight ticket?

ASSISTANT: Sure Charles Martin. Can you please provide your source and destination codes ?

USER: I would like to travel from DFW to PHX.

ASSISTANT: OK. May I know your planned dates?

USER: Sure, I have planned to travel on 12/14 and 12/16.

ASSISTANT: OK. May I know  is there any restrictions about price limit?

USER: Yes, my price and connection limits are 500 and 1. Do you find any flight to me?

ASSISTANT: I got a flight matching all your needs.

USER: OK, please confirm.

ASSISTANT: The airline name is JetBlue ,flight number is 1015. You ticket had booked successfully.

USER: Thank you for helping me for booking a flight ticket.

ASSISTANT: Thank you.