You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Nancy Allen. I am planning to visit Houston Zoo in HOU with my family.

ASSISTANT: May I know your travelling dates?

USER: Can you book a ticket from LGA? My planning dates are from 12/04 to 12/06.

ASSISTANT: Sorry, there is no flight found under your name.

USER: Please book my ticket. That's ok.

ASSISTANT: Thank you for reaching us.

USER: Anyway thank you for your help.

ASSISTANT: You are welcome.