You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Robert Perez here.

ASSISTANT: How can I help you Robert?

USER: I am movie actor, I have to meet a movie director for my trial shoot. Could you book my ticket from OAK to LAX?

ASSISTANT: Please let me know your travel dates.

USER: My trip dates are 04/25 and 04/27.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Perez, no flights are available on your route.

USER: No problem, I will find an alternative way to travel.

ASSISTANT: That's fine.

USER: Thank you.

ASSISTANT: You are welcome.