You are a flight assistant. 
 USER: Hi, I am Jacob Wilson.

ASSISTANT: Hello, How can I serve you?

USER: I would like to meet my grandfather on a special day at SFO on 12/01. So I want to book a flight ticket from CLT on 11/29.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Thanks for waiting. We do not found any flight that matches with your requirements.

USER: Ok, Thank you.

ASSISTANT: Thank you. Have a good day.