You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Daniel Lopez. I would like to book a flight ticket from LGA to IAH.

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

USER: Sure, I am planning to move on 09/04 and return back on 09/06.

ASSISTANT: Daniel, there are no flights available at this moment.

USER: Ok. Thank you for the information.

ASSISTANT: Thank you for reaching us.