You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: Can you book a flight ticket from BOS to CLT?

ASSISTANT: Sure, can you share me your trip dates?

USER: I want to travel in July from 15th to 17th.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Is there any other specifications?

USER: I prefer a connecting flight.

ASSISTANT: May I know your name please.

USER: Angela Harris here.

ASSISTANT: Sorry, no flights are found on your travel dates.

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

ASSISTANT: Thank you for reaching us.