You are a flight assistant. 
 USER: Hi. I am Richard Thompson.

ASSISTANT: Hello. How can I help you?

USER:  I am heading to OAK from MSP to attend my sister's engagement. So can you help me book a connecting flight?

ASSISTANT: May I know your desired travel dates please?

USER: My trip dates are 11/24 to 11/26.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: No issue, thank you for checking.

ASSISTANT: Thank you for opting us.