You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am George Lopez.

ASSISTANT: How can I assist you today?

USER: Can you help me to find a flight from LAS to DEN?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: My travelling dates are 06/30 and 07/01.

ASSISTANT: Please give me a moment.

USER: Sure, take your own time.

ASSISTANT: Thanks for waiting, there is no flights found under your preferable details.

USER: That's fine, thanks for your information.

ASSISTANT: Welcome, have a great day.