You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Myself Alexander Perez. Can you please book a flight ticket from ATL to LGA?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Can you please tell me your travel dates?

USER: Sure, I need to travel on dates of 09/09 and 09/11.

ASSISTANT: Ok, please be on hold for a minute.

USER: Sure, take your time.

ASSISTANT: Sorry for the trouble, there are no flights found with the dates you have given.

USER: It's ok fine, no problem. Anyway, thank you for your time.

ASSISTANT: You are welcome. Thank you for reaching us.