You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I need to visit Oakland to attend a conference meeting. Can you please help me in booking a flight ticket with fare of 1000?

ASSISTANT: Sure, please share me your travel dates.

USER: My travelling dates are departure on 11/26 and return on 11/28.

ASSISTANT: Kindly mention your airport codes.

USER: Sure, my airport codes are from DTW to OAK.

ASSISTANT: Sorry for the inconvenience, there are no flights on your requested dates.

USER: Ok, no issues.

ASSISTANT: Can I know your name please?

USER: Jacob Garcia is my name.

ASSISTANT: Thank you.

USER: Thank you for your help.