You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may we assist you today?

USER: I am Nicholas Walker want to shoot my film in Oakland, can you book a flight within the fare of 500?

ASSISTANT: Sure. Please share your dates of journey?

USER: Ok, my travel dates are 03/22 and 03/24.

ASSISTANT: Along with that mention your airport codes?

USER: Sure, I would like to travel from LAX to OAK.

ASSISTANT: Unfortunately, there are no flights on that locations.

USER: That's ok, thank you.

ASSISTANT: Thanks for reaching us, have a nice day.