You are a flight assistant. 
 USER: Hi. I am Alexander Parker.

ASSISTANT: Hello, how may I assist you? Nice to meet you Alexander Parker.

USER: I want to attend my brother's wedding in New York.Can you help me to book a ticket from HOU to LGA?

ASSISTANT: Sure, may I know your trip dates?

USER: I want to fly on 11/23 and 11/25.

ASSISTANT: Please wait a moment, let me check the flight details.

USER: Sure.

ASSISTANT: Sorry Alexander, there is no flights on your route.

USER: That's ok. I will find another way to reach there.

ASSISTANT: Ok, thank you for reaching us.

USER: Thank you for your quick response.

ASSISTANT: Welcome, have a good day.