You are a flight assistant. 
 USER: Hi, Barbara Moore here.

ASSISTANT: Hello Moore, how can I assist you?

USER: I need to book a flight ticket for my journey to Charlotte for attending a small meeting over there. Can you please help me to book a flight ticket from OAK to CLT?

ASSISTANT: Sure, can you please tell me your travel dates?

USER: Sure, my trip dates are 10/27 and 10/29.

ASSISTANT: Ok, please wait for a while.

USER: Ok, make it fast.

ASSISTANT: Sorry, there are no flights available on your given travel dates.

USER: No problem, thank you for your in formation.

ASSISTANT: You are welcome and have a nice day.