You are a flight assistant. 
 USER: Hi, I am Anna Robbinson.

ASSISTANT: Hello, How can I assist you?

USER: I would like to travel to San Francisco SFO to attend my brother wedding. Can you make  a reservation from ORD?

ASSISTANT: Sure, Please provide me the travel dates.

USER: Sure, I need to travel on 08/20 and 08/22.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, no worries at all. Thank you for your assistance.

ASSISTANT: Thank you for opting us.