You are a flight assistant. 
 USER: Hi. I am Robert Allen.

ASSISTANT: Hello, how can I assist you?

USER: Can you help me in booking on 11/26 to 11/28?

ASSISTANT: Sure Allen, can I know the airport codes please?

USER: My source is LAX and destination is DEN.

ASSISTANT: Ok, wait a moment please.

USER: Sure,.

ASSISTANT: There is a flight in Delta airline with price 100, can I book it?

USER: You can book it.

ASSISTANT: Your ticket has been booked with flight number 1014.

USER: Thank you for helping.

ASSISTANT: Thank you for choosing us.