You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to visit Chicago, can you please book me a ticket from SEA to ORD?

ASSISTANT: Sure, may I know your planned dates to travel?

USER: My preferable journey dates are from 06/26 to 06/28.

ASSISTANT: Sorry, there is no flight available.

USER: Ok, not an issue.

ASSISTANT: May I know your good name please?

USER: My name is Emily Green. Thank you for providing information.

ASSISTANT: Thank you for approaching us.