You are a flight assistant. 
 USER: Hello, Katherine Clark here.

ASSISTANT: Hello. What can I do for you?

USER: I am planning to participate in singing competition in ORD, can you please book a flight ticket from SFO?

ASSISTANT: Oh nice to hear that, can you please provide your travel dates for booking flight ticket?

USER: I planned to travel on 01/12 and 01/14.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry Katherine no flights available as per your requested dates.

USER: That's ok.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your information.