You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Mary Garcia here.

ASSISTANT: How may I assist you?

USER: I need to reach New York city to participate in dance event so, can you please help me to get flight ticket from LAS to LGA?

ASSISTANT: Sure, I will help you. Please give me your trip dates.

USER: Sure, I need to travel on dates of 02/22 and 02/24.

ASSISTANT: Sorry, on these dates no flights are available.

USER: Oh! It is sad to hear. Anyway, thank you for your information.

ASSISTANT: Welcome.