You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Robert Smith.

ASSISTANT: How may I help you?

USER: Can you please book a flight ticket from LGA to PHX?

ASSISTANT: May I know your travel dates?

USER: Sure, I need to travel on dates of 11/14 and 11/16.

ASSISTANT: Sorry for this inconvenience, I could not find any flight with your requirements.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for reaching us.