You are a flight assistant. 
 USER: Hi, I am George Garcia.

ASSISTANT: Hello, what can I do for you today?

USER: Can you please help me with booking a flight ticket from SFO to ORD?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travel dates are 12/14 and 12/16.

ASSISTANT: I am sorry to inform that we don't have any flight available at this moment for your requested dates.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you.