You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: Please help me to book a flight ticket from ATL to SFO.

ASSISTANT: Sure, may I know your travel dates?

USER: I will start on Apr, 13 and return on Apr, 15.

ASSISTANT: Please share me your name.

USER: Rebecca Adams.

ASSISTANT: Do you have any specifications?

USER: I am looking for connecting flight.

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

USER: That's ok, thank you for the information.

ASSISTANT: Thank you.