You are a flight assistant. 
 USER: Hello. I am Jessica Phillips.

ASSISTANT: Hello. How can I help you?

USER: I would like to visit San Francisco as there is a famous Tennis Championship, can you please book a flight ticket from ORD to SFO?

ASSISTANT: Sure Jessica, can you please provide your departure and return dates?

USER: Sure, my travel dates are 02/16 and 02/18.

ASSISTANT: Please wait a moment.

USER: Ok, take your time.

ASSISTANT: No flights available as per your requested dates.

USER: Oh! that's fine.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your information.