You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Catherine Lewis here.

ASSISTANT: How can I aid you?

USER: Reserve a flight ticket that is from LGA to DEN.

ASSISTANT: Sure, I will help you. On which dates you want to travel?

USER: My preferable dates for travelling are 06/24 to 06/26.

ASSISTANT: Yes, I found a flight for you with 1 connection and fare is 100. Can I proceed?

USER: Yes, book this flight.

ASSISTANT: Your ticket has been booked with flight 1002 and airline is UA.

USER: Ok, thanks for booking my flight.

ASSISTANT: Thank you for choosing us.