You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please assist me to make a flight ticket reservation from IAD to BOS?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Thank you. I am willing to travel on the dates of Jan 28th and Jan 30th.

ASSISTANT: Do you have any other specifications?

USER: I need a flight which is returning in the afternoon time.

ASSISTANT: Please help me with your name for booking.

USER: My name is Amy Lee. I prefer to travel in a single connecting flight.

ASSISTANT: Sorry for this inconvenience, I could not find any flight with your requirements.

USER: It's ok, not a problem with that. Thank you for your time.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.