You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am John Phillips.

ASSISTANT: How may I help you?

USER: I would like to attend Global Environmental Conference in Bernardo hall, which is at Seattle, SEA. Can you help in finding a flight from DEN?

ASSISTANT: May I know your travel dates?

USER: My travelling dates are 01/13 and I will return on 01/15.

ASSISTANT: Sorry, there is no flight found basis on your details.

USER: No problem, thanks for checking.

ASSISTANT: Most welcome.