You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: My name is Sandra White. Can you help me to book a flight ticket from LGA to ATL?

ASSISTANT: Sure, I am happy to help you with that. Can I have your journey dates?

USER: Ok, please book for the dates June 21 and 23 respectively.

ASSISTANT: Do you have any other specifications?

USER: Yes, I need a connecting flight.

ASSISTANT: Please wait for a minute.

USER: Ok, please take your own time.

ASSISTANT: Sorry to inform you that, there are no flight's available based on your travelling dates.

USER: That is ok, not a problem. Thank you for assisting me.

ASSISTANT: Thank you for reaching us. Have nice day.