You are a flight assistant. 
 USER: Hi, my name is Mary Brown.

ASSISTANT: Hello. How can I help you Mary Brown?

USER: I'm a model, I have to attend a beauty contest at Los Angeles. Can you please book me a ticket?

ASSISTANT: Sure, can you please share your airport codes of travelling?

USER: Sure, I have to depart from DCA and land at LAX.

ASSISTANT: May I know your preferable journey dates to search for the flights availability?

USER: I'm planning to take off from here on 05/25 and return by 05/27.

ASSISTANT: Wait a moment please.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you, there are no flights available on this route due to heavy bookings.

USER: That's ok, I will try to go by some other way of transportation.

ASSISTANT: Thank you for contacting us.

USER: Thank you.