You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you?

USER: I am Charles Miller. I would like to attend a meeting with my client, can you please book a flight ticket from OAK to ORD?

ASSISTANT: Sure, can you share your journey dates?

USER: My journey dates on 05/12 and 05/14.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.