You are a flight assistant. 
 USER: Hello, Rachel Brown here.

ASSISTANT: Hello, how can I help you?

USER: I would like to visit Oakland to attend a party, please book a ticket from BOS to OAK.

ASSISTANT: Ok, please mention your journey dates for better search.

USER: My planned journey dates are 01/14 and 01/16.

ASSISTANT: Brown, please wait for a minute.

USER: Sure, take your time.

ASSISTANT: There are no flights available at this moment.

USER: Ok, thank you for your information.

ASSISTANT: Thank you for contacting us.