You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Stephanie Lewis.

ASSISTANT: How may I help you?

USER: Could you please help me in booking a flight ticket from OAK to ORD?

ASSISTANT: Sure, help me with the trip dates?

USER: My trip dates are May 8th and May 10th.

ASSISTANT: Sorry, there were no flights available in your desired routes.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.