You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I would like to meet my cousin on her birthday at New York, please help me in booking a ticket from MSP to EWR.

ASSISTANT: Sure, please let me know your travel dates.

USER: My planned travel dates are on Dec 25 and Dec 27.

ASSISTANT: Ok, may I know your name?

USER: My name is Cynthia Rodriguez.

ASSISTANT: Do you have any class preference?

USER: Any class is comfortable for me.

ASSISTANT: I am sorry, there is no flight available on your given travel dates.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: You are welcome and have a nice day.