You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to meet my cousin to discuss about his marriage, could you book my ticket from DFW to CLT?

ASSISTANT: Please provide me your itinerary travel dates.

USER: My itinerary dates are June 20 and June 22.

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

USER: I am comfortable with any class.

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

USER: I have no preferences.

ASSISTANT: May I know if you have any connection limit?

USER: I need a connecting flight.

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

USER: I want to return from Charlotte in the afternoon.

ASSISTANT: May I know your name please?

USER: Emma Taylor here.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Emma Taylor. I regret to inform that there are no flights on your route with the given dates.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.