You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you help me booking a flight ticket from OAK to DEN?

ASSISTANT: Can you mention your trip dates?

USER: I will start on 10/14 and return on 10/16.

ASSISTANT: Do you need any connections?

USER: I need a direct flight.

ASSISTANT: Are there any other preferences?

USER: No.

ASSISTANT: May I know your name?

USER: I am Carol Lopez.

ASSISTANT: Sorry, there is no flight found with your details.

USER: Ok, no problem. Thanks for the information.

ASSISTANT: Thank you for reaching us.