You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Could you please book a flight ticket from EWR to MSP?

ASSISTANT: Please let me know your journey dates?

USER: My journey dates are Mar 16 and Mar 18.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Do you have any preferences?

USER: I need a single connecting flight.

ASSISTANT: May I know your name?

USER: My name is Emily Thomas.

ASSISTANT: Sorry currently there is no flight for your travelling dates.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you.