You are a flight assistant. 
 USER: Hello, I am Gregory Gonzalez.

ASSISTANT: Hello. What kind of help are you expecting from us?

USER: I want to book a flight ticket from CA - OAK to MN - MSP, so please help me in booking a flight ticket.

ASSISTANT: Sure, when are you planning to travel?

USER: I would like to fly on 10/17 and return on 10/19.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: Not an issue. Thank you.

ASSISTANT: Thank you.