You are a flight assistant. 
 USER: Hello. I am James Johnson.

ASSISTANT: Hello. How may I aid you?

USER: To attend a board meeting in Denver. Can you book a flight ticket from EWR to DEN?

ASSISTANT: Sure, I am here to do that. May I know your travel dates please?

USER: I will start on June, 20 and need to return on June, 22.

ASSISTANT: Do you have any price limit?

USER: I can afford up to 200.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: UA airline is providing you a ticket with a single halt and with economy class, shall I proceed?

USER: Please proceed.

ASSISTANT: Your ticket has been reserved with flight-1019.

USER: Thank you for your help.

ASSISTANT: Thanks for reaching us.