You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I serve you today?

USER: I am Frank Hall, I would like to go for a small trip to Las Vegas, LAS. Can you help me with booking connecting flight?

ASSISTANT: Sure, to which airport you would like to land at?

USER:  I want to start from Denver, DEN.

ASSISTANT: Could you please mention your travelling dates?

USER: On 01/19, I want to start. Due to meeting at my location I want to stay there on 01/20 and return will be on 01/21.

ASSISTANT: Ok, may I know your price limit?

USER: 1000, is my price limit.

ASSISTANT: Thanks for waiting, we found a flight in UA airlines with 1004 flight number. Shall I proceed?

USER: Ok, proceed.

ASSISTANT: Your booking has been confirmed.

USER:  Thanks for your valuable service.

ASSISTANT: Thank you for availing us.