You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Myself Samantha Baker. I am looking for a flight from SEA to IAD, can you help me in booking the flight ticket?

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

USER: Sure, my planned travel dates are July 23 and July 25.

ASSISTANT: Do you have any class preference?

USER: No. make sure that I'm looking for a connecting flight.

ASSISTANT:  Samantha Baker, I am sorry to inform you that there is no flight available at your requested dates.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: You are welcome. Thank you for contacting us.