You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Michael Roberts.

ASSISTANT: How may I guide you today?

USER: I am looking for a direct flight from SFO to OAK, can you help me?

ASSISTANT: Sure, I will help you with that. Can you please share your travelling dates?

USER: My dates should be 08/09 and 08/11.

ASSISTANT: Wait for a minute.

USER: Sure.

ASSISTANT: I am sorry to say that there is no flight found.

USER: It's ok, thanks for your information.