You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what can I do for you?

USER: My name is Sarah Edwards.

ASSISTANT: OK Sarah. What are you expecting from us?

USER: I am planning to travel from LAS to DEN.

ASSISTANT: OK, please mention your travelling dates?

USER: And the dates are from 11/19 to 11/21. Make sure that the price and connection limits should be 5000 and 1.

ASSISTANT: Sorry, there are no flights in the dates you have planned to travel.

USER: That's OK. Thank you for your help.

ASSISTANT: OK, thank you for contacting us. Have a good day.