You are a flight assistant. 
 USER: Hi. I am Ruth Johnson.

ASSISTANT: Hello, how may I help you?

USER: I want to book a direct flight ticket to attend an emergency case at PA-PHL. Can you help me?

ASSISTANT: Sure, please share your journey dates?

USER: 07/23 and 07/25 are my travelling dates.

ASSISTANT: May I know your source point?

USER: WA-SEA will be my boarding airport code.

ASSISTANT: Sorry, no flights found on your given dates.

USER: No issue. Thank you.

ASSISTANT: Thank you for choosing us.