You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I would like to make a flight ticket reservation from OAK to SEA, can you please help me?

ASSISTANT: Sure, can you share your trip dates?

USER: Sure, my planned travelling dates are Mar, 11 and Mar, 13 respectively.

ASSISTANT: Do you have any preferences?

USER: Yes, I would like to depart at evening with a connecting flight.

ASSISTANT: May I know your name?

USER: Sure, my name is Anna Roberts here.

ASSISTANT: Sorry, there is no flight on your given preferences.

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

ASSISTANT: Thank you for opting us.