You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am David Hall. I want to book a ticket from LAX to EWR for refreshment purpose.

ASSISTANT: Sure, please provide me your journey dates for better search.

USER: I am departing on 07/24 and return on 07/26.

ASSISTANT: Please give me a minute.

USER: Sure.

ASSISTANT: There is a flight with UA airlines available with price 100. Shall I book the ticket for you?

USER: Please reserve the ticket.

ASSISTANT: Your ticket is confirmed and the flight number is 1003.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us, have a good day.