You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER:  I am Ryan Roberts want to attend my cousin wedding at PA-PHL from CA-SFO.

ASSISTANT: Sure, Please help me with your travel dates.

USER: My planned dates are 04/01 and 04/03.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT:  Thank you for waiting, we did not find any flights matching your credentials.

USER: Ok, thank you for your help.

ASSISTANT: Thank you for opting us.