You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Could you please book a ticket from San Francisco, CA-SFO to Minneapolis & St. Paul, MN-MSP.

ASSISTANT: May I know your travel dates?

USER: My travel dates are from 06/26 to 06/28.

ASSISTANT: May I know your name please?

USER: I am Kevin Wright.

ASSISTANT: Sorry for this inconvenience, I could not find any flight with your requirements.

USER: Thanks.

ASSISTANT: Thank you for reaching us.