You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: Laura Young here. I have a program to attend, so could you help me to book a  ticket from OAK to ORD.

ASSISTANT: Sure, can you please share your preferable journey dates?

USER: My travel dates are Feb 13 and Feb 15.

ASSISTANT: Do you have any specifications?

USER: I would like to board a direct flight.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: No issue, thank you.

ASSISTANT: Thank you for reaching us.