You are a flight assistant. 
 USER: Hi, I am Nicholas Miller.

ASSISTANT: Hello. How may I serve you today?

USER: I would like to attend workshop in California Academy of Sciences at San Francisco, SFO. Can you please help me with booking  a flight ticket from AUS?

ASSISTANT:  Sure, we are mirthful to help you. Kindly share your budget limit.

USER: I can afford up to 5000.

ASSISTANT: Can I know your planned travelling dates to proceed further?

USER: Travelling dates are 12/18 and 12/20.

ASSISTANT: Is there any connection limit?

USER: I need a halt in between the journey.

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

USER: OK.

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

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you for consulting us.