You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Joseph Moore, I want to book a ticket from IAH to JFK for meeting my parents.

ASSISTANT: Help me with the dates.

USER: My travel dates are 05/13 to 05/15.

ASSISTANT: Sorry, there is no reservation found. No flight found.

USER: Ok, thanks for helping me out.

ASSISTANT: Welcome.