You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I  help you?

USER: I am Christopher Garcia, want to travel from OAK to ORD.

ASSISTANT: Your travelling dates please?

USER: My travel dates are from 12/31 to 01/02.

ASSISTANT: May I know your name please.

USER: I have already mentioned.

ASSISTANT: I am sorry no flights found on your route.

USER: It's ok. Thank you.

ASSISTANT: Thank you for choosing us.