You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Jonathan Williams. I planned to meet my cousin in HOU, can you please help me to book a flight ticket from LGA?

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

USER: I prefer to travel on 10/20 and 10/22.

ASSISTANT: Sorry, there is no plane as per your requested travelling dates.

USER: Ok, please confirm my booking.

ASSISTANT: Sorry for the inconvenience, there is no flight as per your information to reserve a seat.

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

ASSISTANT: You are welcome, have a great day.