You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Can you please book a ticket from MSP to CLT? As I need to attend a meeting.

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, my planned departure and return travel dates are 18th and 20th of August.

ASSISTANT: Do you need any specifications?

USER: I prefer single connected flight.

ASSISTANT: May I know your name?

USER: My name is Margaret Lopez.

ASSISTANT: Sorry, there are no flights available on your travelling dates.

USER: That's ok, thank you for giving the information anyways.

ASSISTANT: Thank you for reaching our service.