You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am looking to book a flight ticket from OAK to MSP. Can you help me for that?

ASSISTANT: Sure, I am here to assist you. Can I know your name?

USER: My name is Virginia Wilson.

ASSISTANT: Thank you. Can I know your travel dates?

USER: My travelling dates are May 23 and May 25.

ASSISTANT: Ok, please let me know your class preference.

USER: Any class is fine for me.

ASSISTANT: Sure, please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, there is no flight available on your given travel dates.

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome and thank you for choosing us.

USER: Welcome.