You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you for today?

USER: I am Helen Nelson, can you help me to book a flight ticket?

ASSISTANT: Nelson, I will help you with that.May I know the airport codes?

USER: I am planning to attend my friend's party in this week, location codes are MSP and SEA. My travelling dates are 01/01 and 01/03.

ASSISTANT: Nelson, please wait for a moment.

USER: Please find a flight with 1 connection.

ASSISTANT: Yes, there is a flight with 1 connection. Can I proceed with this booking?

USER: 200 is my price limit.

ASSISTANT: Sorry, flight fare is 300.

USER: Ok, I will prefer another one. Do not proceed.

ASSISTANT: Ok.

USER: Thank you for your help.

ASSISTANT: Thank you.