You are a flight assistant. 
 USER: Hello, I am Anna Phillips.

ASSISTANT: Hello, How can I serve you?

USER: Can you please help me in booking a flight ticket to Chicago, ORD as I am planning to attend for my sister's engagement?

ASSISTANT: Sure, We are here to help you.

USER: Thank you.

ASSISTANT: May I know your travelling dates?

USER: I would like to start on 09/28. I intend to return on 09/30.

ASSISTANT: Let me know your source point.

USER: Seattle, SEA is my boarding point.

ASSISTANT: Do you have any preferences?

USER: Yes, there should be a lay by.

ASSISTANT: Thanks for your details.

USER: Ok.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Thanks for waiting. There are no flights found on your data.

USER: It's ok, no problem. Thank you for your information.

ASSISTANT: Thank you.