You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I aid you today?

USER: I am Nicole Green.

ASSISTANT: What can I do for you Green?

USER: After a long time I want to meet my grandfather in Seattle with my parents to enjoy the holidays. Will you please help me in booking a flight ticket?

ASSISTANT: Sure, I am here to help you, May I know where you are travelling from?

USER: I want to start from CO-DEN.

ASSISTANT: May I know your  returning date?

USER: I intend to return on 02/25.

ASSISTANT: May I know your destination code?

USER: My destination code is WA-SEA.

ASSISTANT: May I know your starting date for where you are willing to travel?

USER: My departure date is 02/23.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates to  enjoy with your family. Do you need any other help from me?

USER: Thank you for your kind information.

ASSISTANT: Thanks for approaching us.