You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Kenneth Thompson.

ASSISTANT: How can I assist you?

USER: Can you please help me in booking my flight ticket from JFK to IAH?

ASSISTANT: Sure, can you please tell your traveling dates?

USER: My travel dates are 08/19 and 05/21.

ASSISTANT: Sorry, no flights bound on your preferable dates.

USER: Thank you for your help.

ASSISTANT: Most welcome.