You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I want to attend a Marriage in Washington. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, Can you please share your your source airport code?

USER: My source airport code is OAK.

ASSISTANT: Kindly, mention your planned trip dates.

USER: My travelling dates are Mar 18 and Mar 20.

ASSISTANT: Please mention your preferred destination airport code?

USER: My destination airport code is IAD.

ASSISTANT: Do you have any connection limit?

USER: I prefer single connecting flight.

ASSISTANT: Is there any class preference?

USER: I am comfortable with any class.

ASSISTANT: Are there any other specifications?

USER: No, I don't have any other specifications.

ASSISTANT: Please forward your name.

USER: My name is Shirley Miller.

ASSISTANT: There are no flights found on your specified trip dates.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for availing us.