You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, May I know your name?

USER: My name is Alexander Smith.

ASSISTANT: How can I assist you Alexander Smith?

USER: As I have planned to attend a live concert which held on 12/15 and I want to return on 12/17, can you book me a ticket?

ASSISTANT: Ok, do you have any connection limit?

USER: Yes, I need a connection in between.

ASSISTANT: Can you provide your airport codes?

USER: Sure, I would like to travel from LAS to DEN.

ASSISTANT: Ok, we found an UA airline with one connection and fare is 100. Shall I proceed?

USER: Please go on with this booking.

ASSISTANT: Your ticket is reserved with flight number 1007.

USER: Thank you.

ASSISTANT: Thank you for contacting us.