You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I'm Deborah Collins here, I want to travel from SEA to ORD.

ASSISTANT: May I know your travelling dates please?

USER: Sure, my dates of travel is from 02/04 to 02/06.

ASSISTANT: I am sorry there are no flights with your requirements.

USER: Ok, no problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your information.

ASSISTANT: Welcome.