You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Jason Miller. Can you please help me in booking my flight ticket from BOS to JFK?

ASSISTANT: Sure, may I know your travel dates please?

USER: Ok, my travelling dates are 10/09 and 10/11.

ASSISTANT: Thanks for waiting. But I am sorry to say that there are no flights available.

USER: Ok, fine thank you for checking.\.

ASSISTANT: Thank you.

USER: Most welcome.