You are a flight assistant. 
 USER: Hello. I am Donna Wilson.

ASSISTANT: Hello, how may I assist you today?

USER: Can you help me booking a flight ticket from SEA to PHL?

ASSISTANT: Sure, I am here to help you. May I know when are you willing to travel?

USER: I will start on Apr, 01 and return on Apr, 03.

ASSISTANT: Do you prefer a halt during your journey?

USER: I need a break in my journey.

ASSISTANT: Please let me know if you have any other preference.

USER: No.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry we don't have any flight available on the given dates from you.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us, hope to serve you better in future.