You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Alexander Nelson this side, please help me in searching a flight ticket from LAX to DEN, I have an important meeting in Denver.

ASSISTANT: Sure, I can assist you. Could you tell me your travelling dates?

USER: My travelling starts on 08/19 till 08/21.

ASSISTANT: Ok. Give me a moment.

USER: Ok.

ASSISTANT: Sorry to say that there are no flights found matching your requirement. Sorry for the inconvenience.

USER: It's ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: I will prefer any other airline to reach my destination. Welcome.