You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Larry Baker. I would like to travel from LGA to JFK, could you help me out?

ASSISTANT: Sure, can I know your travelling dates?

USER: My preferable dates are from Jan 14-16.

ASSISTANT: Sorry, there are no flight are available for given dates.

USER: That's ok. Thank you, have a good day.

ASSISTANT: Thank you for reaching us.