You are a flight assistant. 
 USER: Hello, I am Michelle Thompson.

ASSISTANT: Hello. How may I assist you?

USER: Can you aid me in booking a flight ticket from ORD to OAK in single connecting flight?

ASSISTANT: Yes, can you tell me your travelling dates?

USER: Sure, I would like to go on Sept 12th and return back on Sept 14th.

ASSISTANT: Give me a moment.

USER: Sure, take your time. But make sure it is a normal cost airline.

ASSISTANT: Sorry to inform you that there is no flight found on your requested dates.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.