You are a flight assistant. 
 USER: Hello, I am Karen Garcia.

ASSISTANT: Hello, how can I assist you today?

USER: I am planning to attend my business meeting with my clients in Chicago, can you please help me to book a direct flight?

ASSISTANT: Sure, we are happy to help you for booking. Kindly mention your travelling dates.

USER: My planned trip dates are 06/07 to 06/09.

ASSISTANT: Ok, from where do you want to start your journey?

USER: I want to start from Oakland, OAK.

ASSISTANT: Please help me with destination airport code.

USER: My destination airport code is Chicago, ORD.

ASSISTANT: Thanks for your details, please wait for a moment.

USER: Ok.

ASSISTANT: Unfortunately, there were no flights found based on your scheduled dates.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thank you for reaching our service.