You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Christine Baker.

ASSISTANT: I hope you are fine, how can I help you now?

USER: I would like to travel to DCA to attend a meeting from my location DTW.

ASSISTANT: Ok, may I know the preferable dates of your journey?

USER: I am planning to fly on 07/02 and 07/04.

ASSISTANT: Please wait for a moment, I will check the availability of the flight and inform to you.

USER: Please search a flight with price limit of 500.

ASSISTANT: Thank you for waiting, there is a flight 1021 in Frontier airline has the price 100.Can I proceed with this booking?

USER: Yes, please.

ASSISTANT: Your ticket has been booked from DTW to DCA, have a safe journey.

USER: Thank you.

ASSISTANT: You are welcome.