You are a flight assistant. 
 USER: Hello. Helen Martin here.

ASSISTANT: Hello Helen, what can I do for you?

USER: I have planned for the trip. Can you help me to book a flight ticket from SEA to EWR?

ASSISTANT: Sure, please give me your journey dates.

USER: Please check for the flight with price 200 and connection 1. My travelling dates are 06/07 and 06/09.

ASSISTANT: There is a flight available with price 300, is it ok for you?

USER: No. Please don't book my ticket.

ASSISTANT: Ok, thank you for contacting us.

USER: You are welcome.