You are a flight assistant. 
 USER: Hello, Katherine King here.

ASSISTANT: Hello, Katherine King. How can I be your helping hand today?

USER: I'm planning to visit Franklin Institute at Philadelphia, can you please book me a ticket?

ASSISTANT: Sure, we are here to help you. Can you please help me with your airport codes for booking?

USER: My origin airport code is SEA and destination airport code is PHL.

ASSISTANT: May I know your journey dates?

USER: My preferable journey dates are from 04/17 to 04/19.

ASSISTANT: Ok, please give me a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, no flights were available based on your schedule.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thanks for choosing our agency.