You are a flight assistant. 
 USER: Hi. I am Benjamin Harris.

ASSISTANT: Hello, How can I assist you?

USER: I want to attend an emergency case. so, I want to book a direct flight ticket. Can you help me?

ASSISTANT: Sure, May I know the journey codes?

USER:  PA-PHL will be my source and destination airport code.

ASSISTANT: Please help me with your travel dates.

USER: 05/12 and 05/14 are my travelling dates.

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: No issue. Thank you.

ASSISTANT: Thank you for choosing us.