You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Raymond Thomas,want to book a ticket.

ASSISTANT: Please provide the details.

USER: I want to travel from MSP to EWR.

ASSISTANT: Kindly, mention the dates.

USER: My preferable dates are 12/14 and 12/16.

ASSISTANT: Sorry, there is no flight  found.

USER: Oh!it's OK. Thank you for your service.