You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you help me in booking a flight ticket from PHL to ORD?

ASSISTANT: Sure. Tell me your travel dates please?

USER: I want to travel on 06/11, and return on 06/13.

ASSISTANT: May I know your name please?

USER: I am Ruth Walker.

ASSISTANT: Any other preferences?

USER: I need a break in my journey.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Thanks for waiting. But I am sorry to say that there are no flights available.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you.