You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Karen Johnson.

ASSISTANT: How can I assist you?

USER: I have a tournament at Phoenix, please book a flight ticket under price 200.

ASSISTANT: Sure Karen, can I know the travel dates please?

USER: My travelling dates are from 08/21 to 08/23.

ASSISTANT: Could you please provide the airport codes?

USER: My source code is EWR and destination code is PHX.

ASSISTANT: Ok, wait a moment please.

USER: Ok.

ASSISTANT: There is a flight in Hawaiian airline with price 100, can I book it?

USER: Please proceed with booking.

ASSISTANT: Your ticket has been booked with flight number 1025.

USER: Thank you.

ASSISTANT: Thank you for approaching us.