You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Edward Evans want to shoot my film at Oakland, can you help me to book a flight from best airline for my journey?

ASSISTANT: Ok, I am very glad to help you. Meanwhile may I know your travelling dates of your journey?

USER: Sure, I want to depart on 11/23 and return on 11/25.

ASSISTANT: Ok, I will try to get a flight ticket for you. Can you please tell me your source and destination airport codes?

USER: Yes, I will choose my source as LAX as it is near to me and my destination as OAK.

ASSISTANT: Ok, please wait for a while I will check and let you know about availability of flights.

USER: Sure.

ASSISTANT: Sorry for the inconvenience, I did not find any flight ticket on your preferable dates.

USER: That's ok, thank you.

ASSISTANT: Thank you for opting our service.