You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I provide assistance to you?

USER: Can you reserve a seat to Oakland, OAK?

ASSISTANT: Sure, we will help you for that. Do you need any halt in between your journey?

USER: Ok. Yes, I need a connecting flight for sure.

ASSISTANT: Kindly, share your trip dates for visiting Oakland?

USER: Sure. I will start on 04/04. And return on 04/06.

ASSISTANT: Where are you heading from?

USER: I have to start from San Francisco, SFO.

ASSISTANT: To proceed further, may I know your good name please?

USER: I am Sarah Rodriguez.

ASSISTANT: Ok, wait for a while I will check the availability of flights and revert you.

USER: Sure.

ASSISTANT: We are very sorry to notify you that there is no flight found based on your details.

USER: Ok. Thanks for sharing the details.

ASSISTANT: Thank you for choosing us. Have a pleasant day!.