You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello,. How may I assist you?

USER: I need a ticket to San Francisco, CA-SFO from Philadelphia, PA-PHL for a sport event.

ASSISTANT: Sure,may I know your journey dates and your name?

USER: I am Michelle Thomas. Journey dates are from 05/10 to 05/12.

ASSISTANT: Give me a minute,I will get back to you.

USER: Sure.

ASSISTANT: Thank you for being waiting. Sorry to inform you that,no flights available on your journey date.

USER: Thanks for the assistance.