You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: Please book a ticket to Oakland, OAK with a connecting flight.

ASSISTANT: Sure, May I know the source code?

USER: I want to board from Houston, IAH.

ASSISTANT: Please help me with your travel dates.

USER: My travel dates are 11/30-12/02.

ASSISTANT: May I know your name?

USER: My name is Linda Davis.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Not a problem, thank you.

ASSISTANT: Thank you for opting us.