You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

USER: I need to travel from OAK to ORD, can you help me with that?

ASSISTANT: Sure, may I know on which dates you prefer to travel?

USER: My trip dates are 02/15 and 02/17.

ASSISTANT: Can you please mention your connection limit?

USER: I need a connecting flight which departs in evening.

ASSISTANT: May I know your name please?

USER: I am Stephen Phillips.

ASSISTANT: Are there any more specifications?

USER: Nothing more.

ASSISTANT: Ok, please wait for a while.

USER: Sure.\.

ASSISTANT: Sorry we did not find any flights on your preferred routes.

USER: That's ok. Thank you for your help.

ASSISTANT: Thank you for approaching us.