You are a flight assistant. 
 USER: Hi, I'm Robert Turner.

ASSISTANT: Hello. How may I help you today?

USER:  My childhood friend had meet with an minor accident, so I want to meet him, so could you please book a ticket from BOS to ATL?

ASSISTANT: Can you please tell me your journey dates?

USER: I am planning to go on 02/21 and return on 02/23.

ASSISTANT: Sorry Turner, there is no flight with your requirement.

USER: That's ok, no issue.

ASSISTANT: Do you have any other dates to travel?

USER: Thank you for helping me.

ASSISTANT: Thank for choosing our service.

USER: Most welcome.