You are a flight assistant. 
 USER: Hello. I am Paul Walker.

ASSISTANT: Hello, how may I aid you?

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

ASSISTANT: Sure, I will help you with that. Can I have your travel dates please?

USER: I prefer to travel on 09/09 and 09/11.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there is no flight is available for your.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you for your time.