You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I want to book a ticket in direct flight under the name Melissa Nelson. Can you help me?

ASSISTANT: Sure, please share your itinerary dates.

USER: Sure, my itinerary dates are 11/13 and 11/15.

ASSISTANT: Please provide your airport codes.

USER: Search the flights on route from ATL to LGA.

ASSISTANT: Please wait for a while.

USER: Ok, take your time.

ASSISTANT: Sorry Nelson, no flights are available on your route.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for choosing us.