You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you now?

USER: I am Betty Mitchell.

ASSISTANT: Ok.

USER: Can you help me to book a flight with 200 price limit?

ASSISTANT: Sure, can you please mention the travelling dates of your journey?

USER: My travelling dates are 08/26 and 08/28.

ASSISTANT: Ok, may I know the airport codes please?

USER: My airport codes are BOS and OAK.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: There is a flight 1004 Frontier airline has the price 200. Can I proceed?

USER: Yes, proceed with booking.

ASSISTANT: Your booking is done, have a nice journey.

USER: Thank you.

ASSISTANT: Thank you for approaching us.