You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, do you need any assistance from us?

USER:  My name Michael Perez, can you book a ticket from OAK to ORD?

ASSISTANT: Ok, may I know on what dates you need booking?

USER: My journey dates are from 11/30 to 12/02.

ASSISTANT: Sorry, there is no plane on your requested travel dates.

USER: Ok, no problem. Thank you so much.