You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER:  I am planning to book a flight ticket to PHX from OAK, can you please help me out?

ASSISTANT: Sure, please provide your trip dates.

USER: Sure, my trip dates are Mar 20 and Mar 22.

ASSISTANT: Do you need any connection limit?

USER: I am looking for a flight with 1 connection.

ASSISTANT: Is there any other requirements?

USER: My return time must be in evening.

ASSISTANT: May I know your name?

USER: Sure, my name is Anna Phillips.

ASSISTANT: There are no flights available on your routes.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for choosing us.