You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Raymond Martinez. I would like to book a flight ticket from IAD to BOS.

ASSISTANT: On which date you want to travel?

USER: Sure, I am starting on 06/17 and return back on 06/19.

ASSISTANT: Please wait a while.

USER: Please take your time.

ASSISTANT: There is no flight available on your desired travel dates.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.