You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I lend a hand to?

USER: I am Nicholas Nelson from Los Angeles. Can you please book a flight ticket from LAX to ATL?

ASSISTANT: Nicholas, I am here to help you with this. Can you please share me your journey dates?

USER: Thank you for your positive response, I want to take off on 06/13 and please confirm my return ticket also on 06/15.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Nicholas sorry for inconvenience, no flights are available with your criteria.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you Nicholas for connecting us.