You are a flight assistant. 
 USER: Hello. I am Brenda Edwards.

ASSISTANT: Hello. How can I help you for today?

USER: I planned to attend for a meeting in PHL, can you please help me to book a flight ticket from ORD?

ASSISTANT: Yes, I can help you. Can you share me your travelling dates?

USER: I prefer to travel on 03/30 and 04/01.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no flight found on your requested dates.

USER: Ok, no problem.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your time.