You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Michael Miller. I am planning to travel from DTW to SFO, could you please help me with booking a flight ticket?

ASSISTANT: Sure, can I know the travel dates?

USER: My travelling dates are 03/23 and 03/25.

ASSISTANT: Give me a minute, let me check the details.

USER: Sure.

ASSISTANT: Sorry Miller, there are no flights available on your requested dates.

USER: That's ok. Thank you for the information.

ASSISTANT: You are welcome.