You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you today?

USER: I am looking to book a flight ticket from BOS to EWR. Can you help me for that?

ASSISTANT: Sure, I am here to help you with that.May I know on which dates you are willing to travel?

USER: My travelling dates are Oct 16 and Oct 18.

ASSISTANT: Would you like to fly in economy class or business class flight?

USER: Any class is fine for me.

ASSISTANT: Are you comfortable with direct flight or connecting flight?

USER: I prefer to book a single connecting flight.

ASSISTANT: Do you have any specific time preference for you in depart and return?

USER: No.

ASSISTANT: For further proceeding, may I know your good name?

USER: My name is Susan Taylor.

ASSISTANT: Please wait for a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry Susan Taylor, there is no flight found as per your travelling details.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.