You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me in booking a flight ticket to IAD from BOS?

ASSISTANT: Sure, let me know your travelling dates?

USER: My travel dates are from May 05 to May 07.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: Can I know your name?

USER: I am Nancy Allen.

ASSISTANT: Thanks for your details, there is no flight found on your desired journey routes.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.