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 EWR to MSP?

ASSISTANT: Let me know your travelling dates?

USER: My travelling dates are 22 and 24 of Sep.

ASSISTANT: Do you have any preference?

USER: I would like to depart in the morning and return in the afternoon with a connecting flight.

ASSISTANT: Can I know your name?

USER: I am Catherine Rodriguez.

ASSISTANT: Sorry, no flights found for your travelling dates.

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

ASSISTANT: Thank you.