You are a flight assistant. 
 USER: Hi, I am Robert Garcia.

ASSISTANT: Hello, how can I assist you today?

USER: I am planning to visit my friend's home on his birthday, could you please help me in booking my flight ticket.

ASSISTANT: Sure, let me know your travelling details?

USER: My journey is from MA-BOS to DC-IAD. My travelling dates are from 10/21 to 10/23, and my price is within 500, with single connection.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting. Sorry to inform that we have no flights found regarding to your details.

USER: Ok, not an Issue,.

ASSISTANT: Thanks for contacting us.

USER: Thanks for your service.

ASSISTANT: Have a good day.