You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Timothy Scott and I want to book a flight ticket to attend a bachelor party at CO-DEN at 10/20.

ASSISTANT: Ok, may I know your origin details for this trip?

USER: Sure, I would like to board at CA-OAK.

ASSISTANT: When are you planning to return from this trip?

USER: 10/22 will be my return.

ASSISTANT: Ok, hold for a moment till I check with the availability.

USER: Ok.

ASSISTANT: Timothy Scott, all the flights on your requested route are sold out.

USER: No issue.

ASSISTANT: Sorry for the inconvenience by our agency.

USER: Thank you for your information.

ASSISTANT: Have a nice day.