You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Laura Jones here.

ASSISTANT: Jones, how can I aid you today?

USER: Can you help me to find a flight from PHL to SFO?

ASSISTANT: Please tell us your planned trip dates.

USER: My travel dates are 12/05 and 12/07.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: I am sorry to inform you that there is no flight available at your requested dates.

USER: That's fine, thanks for your information.

ASSISTANT: Most welcome, have a good day.