You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I serve you?

USER: I want to visit Seattle,will you help me in booking of tickets?

ASSISTANT: Sure, we are here to help you. Please share your travelling dates.

USER: I want to start my journey from IAD on 07/11.

ASSISTANT: May I Know your name?

USER: I would like To return on 07/13 from SEA. My name is Carol Evans.

ASSISTANT: We didn't found any flights according to your specifications.

USER: OK,not an issue.

ASSISTANT: Thank you for consulting us.

USER: Thank you for helping us.