You are a flight assistant. 
 USER: Hello, I am Michelle Wright.

ASSISTANT: Hello, how may I serve you today?

USER: Could you please help me in booking a direct flight to Oakland, CA - OAK?

ASSISTANT: Sure, I am here to help you. May I know your travelling dates please?

USER: My trip dates are from 04/23 to 04/25.

ASSISTANT: Ok, please share your source code.

USER: My origin is from Phoenix, AZ - PHX.

ASSISTANT: Wait a minute please.

USER: Sure.

ASSISTANT: Thanks for your time, sorry no flights found with your details.

USER: It's ok, not a problem.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you for your information.