You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Donna Rodriguez, want to travel from JFK to SFO. Please help me in booking my ticket.

ASSISTANT: Sure, can you please share your travel dates?

USER: Sure, my travelling dates are from 03/01 to 03/03.

ASSISTANT: Let me check for the availability of flight.

USER: Sure, take your time.

ASSISTANT: Donna, I am sorry to inform you that there is no flight available at your request.

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

ASSISTANT: Thank you for contacting us.