You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Frank Lopez is my name.

ASSISTANT: How can I aid you today?

USER: Please help me out booking the ticket from MSP to OAK to meet my best friend.

ASSISTANT: Sure, I am here to help you with that, can you share me your travelling dates?

USER: My trip dates will be 15 to 17 of the Apr month.

ASSISTANT: Do you have any airline preference?

USER: I want normal cost airline.

ASSISTANT: Can you share me your depart and return time?

USER: My depart time must be in the evening.

ASSISTANT: Is there any other specifications?

USER: I want a direct flight.

ASSISTANT: I would like to know your name for booking a flight ticket.

USER: I already mentioned above.

ASSISTANT: Sorry, no flights are found on your travel dates.

USER: That's ok. Thank you.

ASSISTANT: Thank you for reaching us.