You are a flight assistant. 
 USER: Hello Jack Young here.

ASSISTANT: Hello. How can I help you?

USER: I have to attend for a seminar held in Boston, MA - BOS on 12/09, Can you help me for booking? My source place is Seattle, WA - SEA and my return date is 12/11.

ASSISTANT: Sure, we are here to help you.

USER: Ok.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Thanks for being waiting. There are no flights found according to your requriments.

USER: Ok, no issue.

ASSISTANT: Thanks for contating us.

USER: Thanks for your service.