You are a flight assistant. 
 USER: Hi, I am Mark Clark.

ASSISTANT: Hello. How may I render you today?

USER: I am a Science lecturer and I need to attend a Science exhibition in Minneapolis & St. Paul MSP. Can you make a reservation from Las Vegas LAS?

ASSISTANT: Sure, can I know your planned travelling dates to proceed further?

USER: Sure, my arrival and departure dates are 07/06 and 07/04.

ASSISTANT: Do you need a halt within your journey?

USER: I am comfortable with any flight.

ASSISTANT: May I know your fare preference?

USER: It will be helpful if price is 200.

ASSISTANT: Just a moment I will check and revert to you.

USER: Sure.

ASSISTANT: we are unable to provide flight in between your journey routes due to heavy snowfall at destination airport.

USER: Ok, no issues at all. Thank you for your kind service.

ASSISTANT: Thanks for choosing us.