You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I be there for you?

USER: Can you help me book a flight ticket from Charlotte in order to attend a film festival at Phoenix, AZ - PHX on the name of Timothy Clark?

ASSISTANT: Sure, may I know from which airport do you prefer to fly out?

USER: I would like to start from my nearest airport, CLT.

ASSISTANT: Ok, do you need a flag stop in between?

USER: I do need a halt within my journey.

ASSISTANT: On what dates will you be travelling?

USER: I will depart on 12/23 and return on 12/25.

ASSISTANT: Ok, there is an Spirit airline which leaves at CLT and arrives at PHX and the flight number is 1009.

USER: You can go ahead for booking with this airline.

ASSISTANT: Your booking is done.

USER: Thank you for being helpful.

ASSISTANT: Thank you for choosing us.