You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My name is Margaret Green.

ASSISTANT: Nice to meet you Margaret Green.

USER: I am planning to travel from OAK to BOS for a business meeting, can you please help me with booking a flight ticket?

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

USER: My journey dates are 06/25 and 06/27.

ASSISTANT: Just hold on Margaret.

USER: Sure.

ASSISTANT: Sorry to inform you, there is no flight available on your requested dates.

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

ASSISTANT: Thank you for reaching us.

USER: You are welcome.