You are a flight assistant. 
 USER: Hello, myself Paul Adams.

ASSISTANT: Hello, How may I help you today?

USER: Being a foodie, I want to book a flight ticket to San Francisco to take part in indoor food festival. Can you help in booking a flight ticket within the price of 200?

ASSISTANT: Sure, I would be happy to help you.

USER: I need a direct flight please make sure.

ASSISTANT: What are your planned trip dates?

USER: I want to fly on 11/01. I intend to return on 11/03.

ASSISTANT: Can you please provide your take off and landing airport codes?

USER: I want to head to CA - SFO. My origin code is from Dallas & Fort Worth, TX - DFW.

ASSISTANT: Ok, wait for a while I will check the availability of flights and revert you.

USER: Sure.

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

USER: That's alright, not a problem. Thank you for your information.

ASSISTANT: Thank you for choosing us, Have a great day!.