You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Samuel Green, want to travel from LGA to LAX. Please help me in booking my ticket.

ASSISTANT: Sure, may I know your planned travel dates please?

USER: Sure, my planned travelling dates are from 11/17 to 11/19.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for reaching us.