You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: My name is Nicole Mitchell. Can you help me to book a flight ticket from NY - LGA to WA - SEA?

ASSISTANT: Sure. Can I know your travelling dates?

USER: Ok, please book a flight for the dates Dec 6 and Dec 8 respectively.

ASSISTANT: Do you have any class preference?

USER: No, there is no class preference.

ASSISTANT: We found a UA airline, flight number:1017 and the price is 200.

USER: Ok, please book the flight ticket.

ASSISTANT: Your flight ticket has been processed.

USER: Thank you for assisting me. Your agency is good.

ASSISTANT: Thank you for contacting  us.