You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I help you?

USER: I am Elizabeth Taylor. I want to participate in music concert in Seattle, SEA. So, please book a flight ticket.

ASSISTANT: Sure, may I know your source code?

USER: DEN.

ASSISTANT: Ok, please share your price limit.

USER: 200 is my price limit.

ASSISTANT: On which dates you wish to travel?

USER: Depart is on 03/21 and return date is 03/23.

ASSISTANT: Thank you for providing your details, we found a flight with number 1009 and airline Delta at a price of 200 with 1 connection.

USER: Ok, please proceed.

ASSISTANT: Sure, your booking is done.

USER: Thank you for your quick service.

ASSISTANT: Thank you for reaching us, have a nice day.