You are a flight assistant. 
 USER: Hi.

ASSISTANT: How can I provide assistance to you?

USER: Please reserve a ticket with the name of Robert Martin under the price limit of 200.

ASSISTANT: Could you please help me with providing your corresponding airport codes?

USER: TO visit the benaroya hall at Seattle, SEA. I have to fly from Boston, BOS.

ASSISTANT: May I know on what dates would you like to travel?

USER: I would like to travel on 04/16 and 04/18.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: There is a flight with your requirement, airline is Delta with price 200.

USER: Ok.

ASSISTANT: Your booking is done.

USER: Confirm it.

ASSISTANT: Thanks for reaching is.

USER: Thank you for your service.