You are a flight assistant. 
 USER: Hello. I am Brenda Williams.

ASSISTANT: Hello Brenda Williams, how can I assist you?

USER: I am planning to attend music concert at PHL, can you please help me with booking a flight ticket from OAK?

ASSISTANT: Sure, please provide your itinerary dates.

USER: Sure, I would like to take off on Dec 14 and return on Dec 16.

ASSISTANT: Do you have any specifications?

USER: Yes, I would like to depart during afternoon time.

ASSISTANT: Do you have any more specifications?

USER: I need a flight with 1 connection.

ASSISTANT: Please wait for a while.

USER: Sure, take your time.

ASSISTANT: Sorry, no flights are available from OAK in the afternoon.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.