You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you help me to book a flight ticket from MSP to EWR?

ASSISTANT: Please provide your journey dates.

USER: My travel dates are 31 May and 02 June.

ASSISTANT: Do you need any connection limit?

USER: I need a connecting flight.

ASSISTANT: Are there any other specifications?

USER: I prefer to depart in the afternoon.

ASSISTANT: May I know your name?

USER: I am Catherine Brown.

ASSISTANT: There are no flights available on your routes.

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

ASSISTANT: Thank you for opting us.