You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Cynthia Wright. Can you help me to book a flight within price 200?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My journey dates are 07/23 and 07/25.

ASSISTANT: Ok, may I know your codes of airport you want to travel?

USER: My preferable airport codes are DFW and MSP.

ASSISTANT: Ok, there is a flight 1015 in Hawaiian airline matching your details with price 100. Shall I proceed?

USER: Proceed with booking.

ASSISTANT: Ok, your booking is done.

USER: Thank you.

ASSISTANT: You are welcome.