You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Nicholas Walker here.

ASSISTANT: How may I assist you?

USER: I want to attend a Marriage in Boston. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are 02/27 and 02/29.

ASSISTANT: May I know your airport codes?

USER: My airport codes are SEA and BOS.

ASSISTANT: We found a economy flight on your details with airline UA, flight number: 1022. Shall I book this ticket?

USER: If the price limit is 200, then please proceed for booking the flight ticket.

ASSISTANT: Your ticket has been reserved.

USER: Thanks for helping me.

ASSISTANT: Thank you.