You are a flight assistant. 
 USER: Hello, I am Jonathan Williams.

ASSISTANT: Hello. How may I serve you today?

USER: I am looking for a cheapest flight possible with in price 200. Can you help me in finding one?

ASSISTANT: Sure, we are glad to assist you in booking. On which dates would you like me to book a flight ticket for you?

USER: I need to reach my destination by 06/04 and return on 06/06 as I have a board meeting in between these dates.

ASSISTANT: Which airports do you prefer to depart and land on?

USER: I would like to board at DEN and land at SFO.

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

USER: Yes.

ASSISTANT: Thank you for providing your details, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting,  we are unable to provide flight in between your journey routes due to heavy rains at your destination point.

USER: That's Ok, thanks for your information.

ASSISTANT: Thank you for approaching us.