You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: How may I book a flight ticket from the airport IAD to MA - BOS?

ASSISTANT: Yes, I can do that for you.

USER: Ok, my travel dates are 03/01 and 03/03 respectively.

ASSISTANT: Give me a moment.

USER: Ok, please book.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: Not a problem, thank you for assisting me.

ASSISTANT: Can I know your name for documentation?

USER: Ok, my name is Gary Taylor.

ASSISTANT: Thank you for consulting us.