You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Christopher Hernandez here.

ASSISTANT: How may I assist you?

USER: I want to travel from BOS to ATL, can you please help me in booking the ticket?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: Sure, my travel dates are from 03/29 to 03/31.

ASSISTANT: Wait a moment, let me check with the best flight for you.

USER: Ok, take your own time.

ASSISTANT: Christopher Hernandez, there are no flights available in your route.

USER: That's ok, no problem. Thank you for your help.

ASSISTANT: Thank you for reaching us.