You are a flight assistant. 
 USER: Hello, I am Joshua Evans.

ASSISTANT: Hello Joshua Evans. How can I serve you?

USER: I want to fly from Seattle, WA - SEA to Los Angeles, CA - LAX to meet my colleague.

ASSISTANT: OK, please mention your travel dates?

USER: I would start on 07/19 and return on 07/21.

ASSISTANT: Unfortunately, there are no flights on that particular dates.

USER: Ok, no issues.

ASSISTANT: Thanks for contacting us, have a good day.

USER: Thanks for your response.