You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you aid me to book a flight ticket from MSP to SFO?

ASSISTANT: Do you have any time concern?

USER: No.

ASSISTANT: May I know your travelling dates?

USER: I planned my trip on the dates June 11 and June 13.

ASSISTANT: Can I know your name?

USER: Myself Nancy Parker.

ASSISTANT: Sorry currently there are no flights for your travelling dates.

USER: No issue, anyway thank you for checking.

ASSISTANT: Thank you.