You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Andrew King here.

ASSISTANT: How can I aid you?

USER: Could you book my ticket from PHL to SEA?

ASSISTANT: Sure, may I know you journey dates please?

USER: My trip dates are 05/29 and 05/31.

ASSISTANT: Wait a moment please.

USER: Ok.

ASSISTANT: Andrew King, there are no flights available in your route.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.