You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Justin Clark.

ASSISTANT: How can I aid you?

USER: I am looking for a flight from ORD to OAK, can you help me out please?

ASSISTANT: Sure, can you share your travelling dates?

USER: My trip dates are from 11/06 till 11/08.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: Sorry, there is no flight on your requested dates.

USER: That's ok, no problem. Thank you for your help.

ASSISTANT: Thank you for reaching us.