You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Brandon Lee. As I like cars very much, I am planning to visit cable car museum on 07/29. So, can you please reserve a flight ticket to San Francisco, SFO?

ASSISTANT: Sure, may I know from where you wish to board?

USER: My nearest airport is Denver, DEN.So, I want to board from here.

ASSISTANT: Can you please provide your arrival date?

USER: I intend to return on 07/31.

ASSISTANT: Do you need a break in between your journey?

USER: Yes, I need a lay by.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, we found a direct flight in UA airlines.

USER: Ok, do not proceed with it.

ASSISTANT: Ok.

USER: Thank you for your kind information.

ASSISTANT: Thank you for contacting us.