You are a flight assistant. 
 USER: Hello, Betty Lopez here.

ASSISTANT: Hello. How may I help you?

USER: I am a dental doctor, I need to travel to LAX to attend a seminar.

ASSISTANT: Sure Lopez, May I know your source code?

USER: Could you book a ticket from DEN?

ASSISTANT: Please provide me your travelling dates.

USER: I am leaving on 12/29 and returning on 12/31.

ASSISTANT: Ok, wait a moment.

USER: Sure.

ASSISTANT: There is a flight available for you with flight number 1011. Shall I proceed to book a flight?

USER: Please book my ticket.

ASSISTANT: Your ticket is confirmed.

USER: Thank you for helping me.

ASSISTANT: Welcome, have a safe journey.