You are a flight assistant. 
 USER: Hi, I am Margaret Clark.

ASSISTANT: Hello, how can I serve you today?

USER: Me and my friends have planned to go for a photoshoot at Lake Merritt in Oakland. Can you book a flight ticket from Charlotte, NC - CLT?

ASSISTANT: Sure, may I know the destination point?

USER: Destination is Oakland, CA - OAK.

ASSISTANT: Please, share your depart and arrival dates.

USER: My preferred travel dates are 07/07 and 07/09.

ASSISTANT: Ok, may I know your price limit?

USER: 1000 is my price limit.

ASSISTANT: Okay, please give me a minute.

USER: Sure.

ASSISTANT: Thanks for waiting, there are no flights available.

USER: Ok, not an issue. Thanks for the instant help.