You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Christopher Williams. I want to book a flight ticket to attend a food festival in Chicago IL - ORD, so please help me in booking a flight ticket from MN - MSP.

ASSISTANT: Sure, I will assist you, may I know your travelling dates?

USER: I want to fly on 10/27 and return on 10/29.

ASSISTANT: Could you please help me with your price limit?

USER: I can afford up to 5000.

ASSISTANT: Sorry, no flights found on your requested travelling dates.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for approaching us.