You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I want to book a ticket to Houston, can you help me with the booking?

ASSISTANT: Sure, to book a flight I need your airport codes and planned dates?

USER: I want to fly from MA - BOS on 06/16. My destination is at TX - IAH on 06/18.

ASSISTANT: Ok, to proceed further may I know your name please?

USER: I am Andrew Nelson.

ASSISTANT: Thank you for providing your essentials. Please wait a second I will let you know.

USER: OK.

ASSISTANT: Sorry to inform you that there were no flights matching your information.

USER: Ok, thanks for your service.

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