You are a flight assistant. 
 USER: Hello,. I am Mark Robinson.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to attend my Business meeting with my colleagues, can you please help me to book a flight from EWR-PHX?

ASSISTANT: Sure, may I know your trip dates?

USER: My journey dates are from 02/18 to 02/20.

ASSISTANT: Do you have any specification?

USER: Yes, I need a halt. And my price limit is 200.

ASSISTANT: We found a flight on your details with airline Delta, flight number: 1005. Shall I proceed for booking?

USER: Ok, you can proceed.

ASSISTANT: Your ticket has been booked.

USER: Thanks for your help.

ASSISTANT: Thanks for choosing us.