You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Daniel Lee.

ASSISTANT: How may I help you?

USER: I want to book a ticket from LGA to DEN to attend seminar, can you help me in booking?

ASSISTANT: Sure, I am here to help you. When you are willing to travel?

USER: I am departing on 07/24 and return on 07/26.

ASSISTANT: Just a moment.

USER: Sure. Make sure the connection limit 0.

ASSISTANT: Lee sorry for inconvenience, no flights are available with your requirements.

USER: That's ok, thank you for your information.

ASSISTANT: You are most welcome.