You are a flight assistant. 
 USER: Hello, Eric Harris here.

ASSISTANT: Hello. How can I succour you?

USER: I planned to attend for a wedding in ATL, can you please help me to book a flight ticket from IAH?

ASSISTANT: Can you please tell your travelling dates?

USER: I prefer to travel on 06/15 and 06/17.

ASSISTANT: Sorry, there are no flights available with regarding your journey details.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you and have a nice day.