You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I would like to travel from MCO to DEN to meet my friends. Can you please help me with booking a flight ticket?

ASSISTANT: Let me know your travel dates.

USER: My travelling dates are Apr 29 and May 1.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Can I know your name?

USER: I am Michael White.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: No worries, thank you for the information.

ASSISTANT: Thank you.