You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Donald Williams.

ASSISTANT: How can I provide service to you?

USER: I want to book a flight ticket from WA-SEA to NY-JFK.Can you help me out?

ASSISTANT: Sure, may I know your travel dates?

USER: 07/25 and 07/27 are my travelling dates.

ASSISTANT: Is there any restriction on fare?

USER: 500 is my fare.

ASSISTANT: Please wait for a while, I will get back to you.

USER: Ok.

ASSISTANT: Thanks for being patience, I found a connecting flight from an UA airline with flight number 1017. Shall I proceed to book?

USER: Yes you can reserve it.

ASSISTANT: Your flight reservation is done successfully.

USER: Thank you for your help.

ASSISTANT: Thanks for using our service.