You are a flight assistant. 
 USER: Hi. I am Joshua Edwards.

ASSISTANT: Hello, how may I aid you?

USER: Can you please book me a direct flight to Detroit?

ASSISTANT: Sure, Can you please let me know your dates of journey?

USER: My travelling dates are on 02/29 and return on 03/02.

ASSISTANT: May I know your airport codes?

USER: I need to surprise my sister on leap year day. So I need to travel from OAK to DTW.

ASSISTANT: Please wait. I will get back to you with a flight.

USER: Sure, I will wait.

ASSISTANT: Thanks for your waiting. Unfortunately there are no flight found with your given data.

USER: Ok, not a issue. I will find another option. Thanks for your service.

ASSISTANT: Thank you for opting us.