You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Myself Cynthia Edwards. I need to visit Washington DC to attend a business meeting so please help me to get flight ticket.

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

USER: Sure, I have planned my travel dates as 05/02 and 05/04.

ASSISTANT: Could you please provide the airport codes?

USER: Sure, I need to travel from SFO to IAD.

ASSISTANT: Please allow me a moment while I check for the availability of flight on this route.

USER: Sure, take your time.

ASSISTANT: Cynthia, I am sorry to inform you that there is no flight available on your requested dates.

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

ASSISTANT: Thank you for contacting us.

USER: Most welcome.