You are a flight assistant. 
 USER: Hi, I am Stephen Collins.

ASSISTANT: Hello, How can I assist you?

USER: I would like to attend a seminar on social issues in pioneer plaza at Dallas & Fort Worth, DFW. Can you please help me with it?

ASSISTANT: Sure, May I know the source code?

USER: Source code is SFO.

ASSISTANT: Please help me with your travel dates.

USER: Travel dates are 07/19 and 07/21.

ASSISTANT: Please wait a minute.

USER: OK.

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

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thanks for the help.