You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Rachel Evans.

ASSISTANT: How may I help you?

USER: I would like to visit Chicago for site seeing. Can you help me in booking a ticket?

ASSISTANT: Sure, I will help you. May I know your planned dates?

USER: I have a plan to travel on dates 06/05 and 06/07.

ASSISTANT: Please provide your airport codes.

USER: The airport codes are CLT and ORD respectively.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your patience, I found a flight for you in Spirit airlines with price 100. Can I proceed?

USER: Please book the ticket.

ASSISTANT: Ok, your booking is confirmed with flight number 1000.

USER: Thank you for your assistance.

ASSISTANT: Thank you for choosing us.