You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: I am James Evans. I have a plan to attend my colleague marriage at Diamond Banquet Hall in Oakland. Could you please help me in booking a flight ticket with fare 5000?

ASSISTANT: Ok, may I know your journey dates?

USER: My journey dates are from 12/31 and 01/02.

ASSISTANT: Sure, please share your journey airport codes.

USER: I would like to deviate from Seattle WA-SEA to Oakland CA-OAK.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Unfortunately, there were no flights found on your requested details.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for choosing us.