You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Sarah Lee planning to visit San Francisco, can you help me to book a flight with price under 200?

ASSISTANT: Sure, I will help you with that. Yes, there are flights with price 200 so please provide me exact airport codes.

USER: Sure, I want to travel from ORD to SFO.

ASSISTANT: Can I have your travel dates please?

USER: Yes, my travelling dates will be 05/07 and 05/09.

ASSISTANT: Please be hold on for a moment.

USER: Ok.

ASSISTANT: Yes, I have found a flight in Frontier airlines with connection 1 and price 100, is it ok for you?

USER: Ok, proceed with my booking.

ASSISTANT: Ok Lee, I have confirmed a ticket with flight number 1008.

USER: Thank you.

ASSISTANT: My pleasure. Thank you for choosing us, have a great journey.