You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Ryan Williams.

ASSISTANT: How can I help you?

USER: I want to attend a wedding in Oakland.Can you help me in booking a ticket?

ASSISTANT: Sure, I will help you. Please share your travel dates?

USER: I would like to travel on 03/05 and 03/07.

ASSISTANT: May I know your desired airport codes please?

USER: I want to travel from MSP to OAK.

ASSISTANT: There is no flight on your desired travel dates.

USER: That's ok. Thank you for your help.

ASSISTANT: Thank you for opting us.