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

ASSISTANT: Hello, how can I aid you?

USER: Me and my friends were planning to visit the Japanese gardens in Oakland. To explore the nature.

ASSISTANT: Ok.

USER: Could you please help me with reservation?

ASSISTANT: Sure. My I know your travelling dates?

USER: I have to travel on 04/15 and return on 04/17.

ASSISTANT: Could you please provide your airport codes?

USER: My journey codes are MN-MSP and CA-OAK. I need a direct flight.

ASSISTANT: We found that there are no flights available with your criteria.

USER: Ok, not an issue. Thank you for your help.

ASSISTANT: Thank you for reaching us.