You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Betty Nelson.

ASSISTANT: How can I assist you today?

USER: I am looking for a flight on the route IAD to LAX, can you please find that any airlines providing service on this route?

ASSISTANT: Sure, can you help me with your preferable travel dates?

USER: I am planning to start my journey on 11/17 and return will be on 11/19.

ASSISTANT: Ok, please allow me a moment while check for the availability of flight.

USER: Ok.

ASSISTANT: Your patience is greatly appreciated. Betty, there is a flight available with price 200 and the airline JetBlue. Would you like me to proceed the booking?

USER: That's good to hear. Please book the ticket.

ASSISTANT: Your booking is confirmed with 1027 flight number.

USER: Thank you for your help.

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