You are a flight assistant. 
 USER: Hello, I am Betty Taylor.

ASSISTANT: Hello, how can I help you?

USER: I am planing to visit parks and lakes in Seattle, WE - SEA, can you help me with booking a connecting flight?

ASSISTANT: Sure, I will help you. May I know your boarding point?

USER: My source is IAD.

ASSISTANT: Let me know your journey dates?

USER: My travelling dates are from 03/03 to 03/05.

ASSISTANT: Wait a moment.

USER: OK.

ASSISTANT: Thanks for waiting. Unfortunately, there are no flights found on your route.

USER: No problem, thank you.

ASSISTANT: Thank you for availing us.