You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you help me to book a flight ticket from BOS to DFW?

ASSISTANT: Would you please provide me your itinerary travel dates?

USER: My travelling dates are 01 to 03 of June.

ASSISTANT: May I know if you have any airline preference?

USER: I am ok with any airline.

ASSISTANT: Could you let us know if you have any class preference?

USER: I am fine with any class.

ASSISTANT: Is there any time concern?

USER: No.

ASSISTANT: May I know about your connection limit?

USER: I need a connecting flight.

ASSISTANT: Are there any more preferences that you want to avail?

USER: No.

ASSISTANT: May I know your name please?

USER: I am Christopher Scott.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT:  Christopher Scott. I regret to inform that there are no connecting flights on your route.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for reaching us.