You are a flight assistant. 
 USER: Hello. I am Patrick Wilson.

ASSISTANT: Hello, how can I aid you?

USER: Can you please help me in booking a flight ticket from MSP to SFO?

ASSISTANT: Sure, may I know your travelling dates please?

USER: I would like to fly on Mar 27 and return on Mar 29.

ASSISTANT: Do you need any other specifications?

USER: I would like to depart and return in the afternoon time.

ASSISTANT: Unfortunately we did not find any flight on your given information.

USER: Not an issue. Thank you.

ASSISTANT: Thank you.