You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I best serve you today?

USER: Can you book a flight ticket from SFO to OAK?

ASSISTANT: Sure, we are here to help you. Can you please share me your travel dates?

USER: Thank you, my travel dates are Nov, 18 and Nov, 20.

ASSISTANT: Please share your good name.

USER: Jessica White here.

ASSISTANT: Do you have any specific preferences?

USER: I need to return at afternoon time with connecting flight.

ASSISTANT: Sorry, there is no flight at this moment.

USER: It's ok, thank you for checking.

ASSISTANT: Thank you.