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

ASSISTANT: Hello, how can I abet you?

USER: I would like to attend a arts and crafts festival at Oakland, CA-OAK to exhibit my collection. Could you please help me with booking a flight ticket?

ASSISTANT: Sure, we are glad to help you. On which dates you would like me to reserve your seat?

USER: Please book a ticket on dates 07/26 and 07/28.

ASSISTANT: Let me know your source airport code.

USER: Sure, Charlotte, NC-CLT is my source airport code.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Are you comfortable with a direct flight?

USER: No, I need a connecting flight.

ASSISTANT: Sorry, we don't have connecting flight on your dates.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for picking us.