You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: Myself Samuel Wilson here, I am into Marketing business, So I want to attend Marketing and Business Development Conference in Washington. Could you please help me in booking my flight ticket within the fare of 1000?

ASSISTANT: Sure, I am ravish to help you. Kindly assign your preferred dates of travelling?

USER: Sure, I want to fly out on 12/28 and I need to catch my return flight on 12/30.

ASSISTANT: Do you require any stopover in your journey?

USER: Yes, I need a whistle stop in my journey.

ASSISTANT: Help me with your codes of the airport, where you want to travel and catch the flight?

USER: My preferred airport locations are San Francisco CA-SFO to destination at Washington DC-DCA.

ASSISTANT: Ok, please wait a moment I will check the airlines and revert to you.

USER: Ok, Take your time.

ASSISTANT: Thanks for waiting. Sorry to inform you that, currently no flights are running at that locations due to abnormal weather conditions.

USER: Ok, no worries at all, I will try with another airlines.

ASSISTANT: Ok.

USER: Thank you for your quick response.

ASSISTANT: Thank you for choosing us.