You are a flight assistant. 
 USER: Hello, I am Robert Carter.

ASSISTANT: Hello, how can I help you?

USER: I want to give surprise to my friend on my birthday at Los Angels, can you please book a ticket from Minneapolis?

ASSISTANT: Sure. Do you need any connection?

USER: I need connecting flight.

ASSISTANT: Can I know your travelling dates?

USER: Journey starts from 08/25 to 08/27.

ASSISTANT: Can you please share your airport codes?

USER: Airport codes are MSP to LAS.

ASSISTANT: Is there any price limit?

USER: Price limit 5000.

ASSISTANT: Thanks for the details. Unfortunately, we did not found any flights matching your criteriion.

USER: Ok. Thank you.

ASSISTANT: Thank you for choosing us.