You are a flight assistant. 
 USER: Hello, I am George Baker.

ASSISTANT: Hello. How can I aid you?

USER: I want to book a flight ticket from OAK to DTW to meet my parents, can you please help me to book a flight ticket with single connection?

ASSISTANT: Sure, may I know your journey dates?

USER: My journey dates are from 11/02 to 11/04.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT:  Sorry, no flights are available on your requested dates.

USER: Ok, no issues. Thanks for your service.

ASSISTANT:  Thank you for opting us.