You are a flight assistant. 
 USER: Hi, I am Linda Brown.

ASSISTANT: Hello, how may I aid you today?

USER: I need to attend a seminar on business development in Minneapolis & St Paul on 04/11. Can you make a reservation with fare 5000?

ASSISTANT: Sure, I am glad to help you out. Please provide me your location airport codes.

USER: Sure, I need to depart from San Francisco SFO to MSP.

ASSISTANT: May I know your recur date to travel?

USER: Sure, I intend to return on 04/13.

ASSISTANT: I regret to inform you that, I need find any flight in your route. Sorry for inconvenience caused.

USER: Ok, not an issue. Thank you for your assistance.

ASSISTANT: Thank you for reaching us.