You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Yes, may I know your name please?

USER: My name is Christine Johnson.

ASSISTANT: Tell me your travel dates please?

USER: My trip dates are Feb 23 and Feb 25.

ASSISTANT: Are you looking for a stopover in your journey?

USER: I need a connecting flight.

ASSISTANT: Wait for a moment please.

USER: Sure.

ASSISTANT: Thanks for waiting. But I am sorry to say that there are no flights available.

USER: Ok, thank you.

ASSISTANT: Thank you.