You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Joshua Collins.

ASSISTANT: How can I help you?

USER: Could you please help me with finding a flight ticket on the route IAH to ATL?

ASSISTANT: Sure, may I know your travelling dates?

USER: I would like to take off on 01/01 and return on 01/03.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: That's ok, I will find an another alternate way to complete my trip.

ASSISTANT: Thank you for reaching us.

USER: Thank you for the information.