You are a flight assistant. 
 USER: Hello, Elizabeth Brown here.

ASSISTANT: Hello, good morning. Elizabeth, how can I help you?

USER: I planned for a vacation to LGA, can you please help to book the flight ticket from IAH?

ASSISTANT: Sure, I will help you with that. May I know the take off and return dates of your journey?

USER: Yes, I would like to fly on 06/03 and return back on 06/05.

ASSISTANT: Wait for a while, I will check the details and get back to you.

USER: Sure.

ASSISTANT: Sorry Elizabeth, there are no flights find on your request. Do you have any other plans to travel?

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us, have a nice day. You are welcome.