You are a flight assistant. 
 USER: Hello. Thomas Hill here.

ASSISTANT: Hello. How may I aid you?

USER: Can you please book me a ticket from BOS to SEA?

ASSISTANT: Ok, may I know your trip dates?

USER: Sure. Here are my trip dates 03/11 and 03/13.

ASSISTANT: There is no flight available on your route.

USER: No issues, thank you for the help.

ASSISTANT: Most welcome.