You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Paul Taylor. Can you please help me to book a ticket from PHL to SEA?

ASSISTANT: Sure, I am happy to help you. Can I know your travelling dates?

USER: The travelling dates are 01/24 and 01/26.

ASSISTANT: Ok, wait for a minute.

USER: Ok, take your time.

ASSISTANT: Sorry to say that, there are no flight's available based on your travelling dates.

USER: It's ok, thank you for checking the flight.

ASSISTANT: Thank you for reaching us.