You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I want to travel from CLT to BOS. Can you help me to book a flight ticket?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: I want to fly in the flight on Oct 14 and Oct 16.

ASSISTANT: Do you have any preferences about flight connections?

USER: I am looking for a connecting flight.

ASSISTANT: Do you have any preferences about class?

USER: No.

ASSISTANT: Please mention your name.

USER: Brian Williams.

ASSISTANT: There are no flights found under your preferable details.

USER: That's ok. Anyways, thank you.

ASSISTANT: Welcome, have a great day.