You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Emma Collins. I need to book a flight ticket from MSP to OAK, Can you please help me for booking?

ASSISTANT: Sure, can I know your travelling dates?

USER: I would like to travel on 02/05 to return on 02/07.

ASSISTANT: Do you have any particular time for departing and returning?

USER: I would be return on afternoon.

ASSISTANT: Would you like to prefer direct flight or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Which class do you prefer?

USER: I am comfortable with any class.

ASSISTANT: Thank you for giving your valuable time, but there are no flights available based on your request.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for opting us, we hope to serve you again with better features.