You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I want to reserve my ticket from ORD to SFO, can you please help me in this?

ASSISTANT: Sure, may I know your dates of journey please?

USER: Sure, my travelling dates will be 08/10 and 08/12.

ASSISTANT: Ok, may I know your name please?

USER: Sure, my name is Michelle Garcia.

ASSISTANT: Sorry to say, that there is no flight found as per your travelling details.

USER: That's ok, thank you.

ASSISTANT: You are welcome.