You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: I am Samuel Garcia. I planned to meet my friend in BOS, can you please help me to book a flight ticket from ATL?

ASSISTANT: Sure, may I know your trip dates?

USER: I planned to travel on 04/05 and 04/07.

ASSISTANT: Sorry, there is no flight on you requested travelling dates.

USER: Ok, no problem. Thank you.

ASSISTANT: You are welcome.