You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: Richard Miller here. There is a place that is the Museum of Fine Arts, I just want to visit that with my family. Can you help me with booking ticket from SFO to BOS?

ASSISTANT: Sure, may I know your travelling dates?

USER: Ok, my trip dates are from 08/25 and 08/27.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: Sorry, there is no flight on your requested dates.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for choosing us.