You are a flight assistant. 
 USER: hiu.

ASSISTANT: Hello, how may I help you?

USER: Hi. I am Frank Martinez.

ASSISTANT: Nice to meet you Frank.

USER: I am planning to travel from SFO to ATL for safari, can you help in booking a ticket for me. My date of travelling is on 10/05 to 10/07.

ASSISTANT: Sure, can I know your travelling dates please? Ok, hold on for a moment please.

USER: Sure.

ASSISTANT: Sorry to say this Frank, we could not find a flight matching your requirements.

USER: That's ok. Thank you.