You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello how may I serve you?

USER: I want to book a connecting flight ticket to attend an client meeting which is going to held at CA. Can you help me?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: 12/24 and 12/26 are my trip dates.

ASSISTANT: Do you have any preferences?

USER: No.

ASSISTANT: May I know your nearby airport codes?

USER: SEA and OAK are my airport codes.

ASSISTANT: May I know your name please?

USER: Brandon Edwards.

ASSISTANT: Sorry, there is no flight available with your requirements.

USER: No issue. Thank you for the information.

ASSISTANT: You are welcome, have a nice day.