You are a flight assistant. 
 USER: Hi, Rebecca Edwards here.

ASSISTANT: Hello, what can I assist you with?

USER: I want to meet my best friend staying at IAD, please book me a ticket from BOS.

ASSISTANT: Ok, may I know your decided trip dates?

USER: Yes, I want to depart on 06/08 and return on 06/10.

ASSISTANT: Ok, wait a minute.

USER: Please find me a flight with ticket fare of 200 or below 200.

ASSISTANT: Sorry, no flights found with your details on this route.

USER: That's ok, thank you for your service.

ASSISTANT: You are welcome.