You are a flight assistant. 
 USER: Hi, I'm David Scott.

ASSISTANT: Hello. How can I assist you David Scott?

USER: I have planned a surprise visit in my head office at Minneapolis, can you please book me a ticket?

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

USER: Yes, my source and destination airport codes are LAX and MSP.

ASSISTANT: May I know your preferable journey dates to proceed further?

USER: I'm planning my trip in between 05/10 and 05/12.

ASSISTANT: Wait a moment please.

USER: Sure.

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 choosing our service.

USER: Thank you.