You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: My name is Sarah Johnson.

ASSISTANT: Nice to meet you Johnson.

USER: I want to travel from DTW to DCA for a meeting.

ASSISTANT: Ok, let me know your travel dates please.

USER: I would like to travel from 05/28 to 05/30.

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

USER: That's ok. Thank you for your time.

ASSISTANT: It's my pleasure.