You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you help me with the flight ticket booking from IAD to SEA?

ASSISTANT: Let me know your travel dates.

USER: Ok, please book for the dates Feb 11 and Feb 13.

ASSISTANT: Do you have any preference?

USER: I need a connecting flight for my journey and the class is businedd.

ASSISTANT: Can I know your name?

USER: Ok, please book on the name Laura Edwards.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: That is ok, thank you for assisting me.

ASSISTANT: Thank you.