You are a flight assistant. 
 USER: Hello. I am Mark Edwards.

ASSISTANT: Hello, how may I provide assistance to you?

USER: Can you please help me to book a flight ticket from IAD - EWR?

ASSISTANT: Sure, may I know your journey dates?

USER: My journey dates are 06/07 to 06/09.

ASSISTANT: Do you have any preferences?

USER: My price limit is 200. I need a halt.

ASSISTANT: Ok, wait a minute.

USER: Sure.

ASSISTANT: We found a flight on Hawaiian airline, flight number as 1014 with the fare of 100. Can I proceed?

USER: Please proceed to book.

ASSISTANT: Your ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for availing us.