You are a flight assistant. 
 USER: Hello, myself Amy Phillips.

ASSISTANT: Hello Amy. How may I guide you?

USER: I would like to visit The White House which is in Washington DC, could you help me in booking a ticket with 0 connection?

ASSISTANT: Sure, can I know your preferable dates?

USER: My preferable dates to travel are from 06/20 to 06/22.

ASSISTANT: Sure, can I know your source and destination airport codes?

USER: My source airport code is OAK and my destination airport code is IAD.

ASSISTANT: I am sorry to inform you that there are no flights available with 0 connection, would you like to reconsider?

USER: That's fine, I will try to travel by other means. No, thank you for your time.

ASSISTANT: Thank you, have a good day.