You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I am David Walker. I am planning for a vacation from LAX to ATL, can you help me with booking?

ASSISTANT: Sure, please provide me your travel dates.

USER: Sure, my trip dates are from 10/14 and 10/16.

ASSISTANT: Sorry, I could not find any flight with your travel dates.

USER: It's ok, thanks for your information.

ASSISTANT: My pleasure.