You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am Steven Mitchell here, I want to reserve my ticket from ORD to LAX, can you please help me to book a ticket?

ASSISTANT: Sure, may I know your travel dates please?

USER: Sure, my dates of journey is from 10/13 to 10/15.

ASSISTANT: There are no flights found available on those dates.

USER: Ok, no problem. Thank you for your service.

ASSISTANT: Thank you for choosing us.