You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Steven Martinez.

ASSISTANT: How may I aid you?

USER: I am planning to celebrate my birthday in Angel Island in OAK. Can you help me in booking a ticket from ORD?

ASSISTANT: Sure, please provide your journey dates.

USER: My planning dates are from 02/05 to 02/07.

ASSISTANT: Sorry Steven, no flights are available on your details.

USER: It's fine. Thank you for your help.

ASSISTANT: Thank you for reaching us.